119-HR-1366 DC Insider Whip Count Analysis

Breakdown: expected support and opposition

Status and institutional context: H.R. 1366 was reported by House Natural Resources on Sept. 17 (25–17) and placed on the Union Calendar with H. Rept. 119‑386 on Nov. 25, 2025. Republicans control both chambers (Speaker Mike Johnson; Senate Majority Leader John Thune), but the Senate filibuster remains operative. [2]Congress.gov — H.R.1366 – All Information (Except Text): actions and committee…[1]Congress.gov — H.R.1366 – Mining Regulatory Clarity Act of 2025: Reported (RH)…[7]Associated Press — Mike Johnson narrowly reelected House speaker as 119th Congr…[6]Sen. John Thune official site — Thune delivers first remarks as Senate Majority…

• House GOP conference: Expect near‑uniform support. The 118th‑Congress predecessor (H.R. 2925) passed the House 216–195 with 207 Rs voting yea and only 1 R nay—indicative of strong caucus discipline on this issue. [3]Clerk, U.S. House of Representatives — House Roll Call 191 (May 8, 2024): Passa…
• House Democrats: Opposition from environmental and progressive blocs will dominate, but a small Western/energy‑state crossover is likely. In 2024, nine Ds voted yes on the predecessor; anticipate roughly 5–15 Democratic yes votes again (Nevada delegation signals remain supportive). [3]Clerk, U.S. House of Representatives — House Roll Call 191 (May 8, 2024): Passa…[8]Rep. Mark Amodei official site — Rep. Amodei press release reintroducing MRCA w…
• House committees/coalitions: Natural Resources Chair Bruce Westerman is a visible champion; pro‑resource caucuses and mining‑state members provide additional lift. [9]House Natural Resources Committee — Chairman Bruce Westerman – House Committee…
• Senate Republicans: Broad support expected; S.544 was ordered reported favorably out of ENR under GOP Chair Mike Lee. [4]Congress.gov — S.544 – Mining Regulatory Clarity Act: All Information (Except T…[10]Senate Committee on Energy & Natural Resources — Heinrich, Lee announce ENR sub…
• Senate Democrats/Independents: Two Nevada Democrats (Cortez Masto—sponsor; Rosen—co‑sponsor) are yes. To beat a filibuster, leadership needs roughly 5–7 additional D/I votes; ranking member Heinrich will shape the caucus posture through ENR. [5]Congress.gov — S.544 – Cosponsors list (Cortez Masto sponsor; Rosen, Murkowski,…[4]Congress.gov — S.544 – Mining Regulatory Clarity Act: All Information (Except T…
• Interest‑group lines: Strong support from National Mining Association, Nevada Mining Association, ClearPath Action, BPC Action, and ZETA; opposition led by Earthjustice and LCV, which scored the 2024 vote negatively—pressure that deters many Democrats. [11]ClearPath Action — Issue brief: Mining Regulatory Clarity Act (S.544/H.R.1366)…[12]Sen. Catherine Cortez Masto official site — Cortez Masto press release announci…[13]Earthjustice — Earthjustice press statement opposing the Mining Regulatory Clar…[14]League of Conservation Voters — LCV 2024 Scorecard item: ‘Jeopardizing Public L…

Key text features affecting votes: the bill codifies multiple 5‑acre mill sites “reasonably necessary” to operations and creates an Abandoned Hardrock Mine Fund financed from claim‑maintenance fees—framings industry backs and environmental groups contest. [1]Congress.gov — H.R.1366 – Mining Regulatory Clarity Act of 2025: Reported (RH)…

Key legislators to watch

Members with leverage on floor math or caucus signaling.

• Rep. Mark Amodei (R‑NV): Sponsor and long‑time point for mining on public lands; effective liaison with leadership for floor time. [8]Rep. Mark Amodei official site — Rep. Amodei press release reintroducing MRCA w…
• Rep. Steven Horsford (D‑NV): Democratic co‑sponsor; his support provides bipartisan cover for a handful of swing‑district or resource‑state Democrats. [8]Rep. Mark Amodei official site — Rep. Amodei press release reintroducing MRCA w…
• Chair Bruce Westerman (R‑AR), House Natural Resources: Committee champion; will help drive Rules strategy and conference messaging to keep Rs unified. [9]House Natural Resources Committee — Chairman Bruce Westerman – House Committee…
• Sen. Catherine Cortez Masto (D‑NV) and Sen. Jacky Rosen (D‑NV): Lead D proponents in the Senate; pivotal for recruiting additional Democrats beyond Nevada. [5]Congress.gov — S.544 – Cosponsors list (Cortez Masto sponsor; Rosen, Murkowski,…
• Sen. Mike Lee (R‑UT), ENR Chair, and Sen. Martin Heinrich (D‑NM), ENR Ranking Member: Committee gatekeepers for timing and any manager’s package; Heinrich’s stance will influence undecided Democrats. [10]Senate Committee on Energy & Natural Resources — Heinrich, Lee announce ENR sub…
• Historical crossover indicators: On the 2024 House vote, nine Democrats supported the predecessor; Mary Peltola was an original co‑sponsor then—useful precedent as leadership courts a modest D bloc this time. [3]Clerk, U.S. House of Representatives — House Roll Call 191 (May 8, 2024): Passa…[15]Web search · turn 13 #6

Leadership influence and procedure

Where leverage sits and how the bill is most likely to move.

• House: Speaker Mike Johnson presides over a narrow GOP majority but has demonstrated capacity to pass energy/land‑use priorities; expect floor time via a structured rule once bandwidth allows. [7]Associated Press — Mike Johnson narrowly reelected House speaker as 119th Congr…
• House committee path: The bill is reported and on the Union Calendar; Rules will likely run a limited‑amendment process given 2024’s experience. [1]Congress.gov — H.R.1366 – Mining Regulatory Clarity Act of 2025: Reported (RH)…
• Senate floor: Majority Leader John Thune controls timing; with the filibuster preserved, leadership will likely seek either a time agreement reflecting bipartisan co‑sponsorship or attach text to a broader permitting/minerals or NDAA/minibus vehicle. [6]Sen. John Thune official site — Thune delivers first remarks as Senate Majority…
• Senate committees: ENR has already advanced the companion favorably, positioning the measure for placement on the Senate Calendar or inclusion in a bipartisan package. [4]Congress.gov — S.544 – Mining Regulatory Clarity Act: All Information (Except T…
• Executive branch posture: The administration is overtly pro‑domestic mining and has moved to fast‑track projects and loosen constraints—signaling low veto risk if the bill hits the Resolute Desk. [16]The White House — Executive Order: Immediate Measures to Increase American Mine…[17]Reuters — Trump to fast‑track permitting for 10 mining projects across U.S.

Assessment: odds and timing

Bottom line from a whip and procedure perspective.

• House passage: High likelihood. The bill mirrors a measure that cleared the House 216–195 in 2024 with nine Democratic votes; GOP control and favorable committee action point to replicating or exceeding that margin. [3]Clerk, U.S. House of Representatives — House Roll Call 191 (May 8, 2024): Passa…[1]Congress.gov — H.R.1366 – Mining Regulatory Clarity Act of 2025: Reported (RH)…
• Senate passage: Moderate likelihood. Republicans are broadly supportive; with two Nevada Democrats on the bill, leadership still needs ~5–7 additional D/I votes or a legislative vehicle that commands 60. Committee reporting without amendment favorably is a strong signal but not dispositive under the filibuster. [4]Congress.gov — S.544 – Mining Regulatory Clarity Act: All Information (Except T…[5]Congress.gov — S.544 – Cosponsors list (Cortez Masto sponsor; Rosen, Murkowski,…
• Enactment this Congress: Moderate. Best path is as part of a bipartisan energy/permitting package or a negotiated rider on a must‑pass (NDAA/appropriations) during early 2026, leveraging White House support to neutralize veto risk. [16]The White House — Executive Order: Immediate Measures to Increase American Mine…

Sourcing (selected)

Key references underpinning positions, vote history, and institutional control.

• Bill status/text/reporting: Congress.gov H.R.1366—reported text (Union Calendar No. 336; H. Rept. 119‑386) and action history. [1]Congress.gov — H.R.1366 – Mining Regulatory Clarity Act of 2025: Reported (RH)…[2]Congress.gov — H.R.1366 – All Information (Except Text): actions and committee…
• House 2024 floor precedent: Clerk tallies for H.R. 2925 (passage and recommittal) and LCV scorecard framing. [3]Clerk, U.S. House of Representatives — House Roll Call 191 (May 8, 2024): Passa…[18]Web search · turn 13 #2[14]League of Conservation Voters — LCV 2024 Scorecard item: ‘Jeopardizing Public L…
• Senate companion: Congress.gov S.544—sponsor/cosponsors and ENR reporting. [4]Congress.gov — S.544 – Mining Regulatory Clarity Act: All Information (Except T…[5]Congress.gov — S.544 – Cosponsors list (Cortez Masto sponsor; Rosen, Murkowski,…
• Chamber leadership/control: AP on Speaker Johnson’s reelection; Thune’s majority leader statement. [7]Associated Press — Mike Johnson narrowly reelected House speaker as 119th Congr…[6]Sen. John Thune official site — Thune delivers first remarks as Senate Majority…
• Committee leadership: House Natural Resources (Chair Westerman); Senate ENR (Chair Lee/Ranking Heinrich). [9]House Natural Resources Committee — Chairman Bruce Westerman – House Committee…[10]Senate Committee on Energy & Natural Resources — Heinrich, Lee announce ENR sub…
• Interest groups: ClearPath Action briefing (support coalition); Cortez Masto release (NV Mining Association/NMA quotes); Earthjustice opposition. [11]ClearPath Action — Issue brief: Mining Regulatory Clarity Act (S.544/H.R.1366)…[12]Sen. Catherine Cortez Masto official site — Cortez Masto press release announci…[13]Earthjustice — Earthjustice press statement opposing the Mining Regulatory Clar…
• Administration posture: White House executive actions to accelerate minerals; Reuters on project fast‑tracking. [16]The White House — Executive Order: Immediate Measures to Increase American Mine…[17]Reuters — Trump to fast‑track permitting for 10 mining projects across U.S.