The Senate is set to pass on Thursday a bipartisan resolution to limit President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE’s ability to take military action against Iran, handing the president a rebuke on foreign policy a week after voting to acquit him in his impeachment trial.

As many as eight Republicans are expected to vote for the resolution, which directs the president to terminate the use of the U.S. armed forces in hostilities against Iran.

They are Sens. Mike Lee Michael (Mike) Shumway LeeMcConnell shores up GOP support for coronavirus package McConnell tries to unify GOP Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump MORE (Utah), Rand Paul Randal (Rand) Howard PaulSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill MORE (Ky.), Susan Collins Susan Margaret CollinsThe Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally Gideon leads Collins by 12 points in Maine Senate race: poll Senate leaders quash talk of rank-and-file COVID-19 deal MORE (Maine), Todd Young Todd Christopher YoungSenate GOP eyes early exit Why the US should rely more on strategy, not sanctions Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump MORE (Ind.), Jerry Moran Gerald (Jerry) MoranLobbying world This World Suicide Prevention Day, let's recommit to protecting the lives of our veterans Hillicon Valley: Zuckerberg acknowledges failure to take down Kenosha military group despite warnings | Election officials push back against concerns over mail-in voting, drop boxes MORE (Kan.), Lamar Alexander Andrew (Lamar) Lamar AlexanderTrump health officials grilled over reports of politics in COVID-19 response Now is the time to renew our focus on students and their futures CDC says asymptomatic people don't need testing, draws criticism from experts MORE (Tenn.), Bill Cassidy William (Bill) Morgan CassidyCoushatta tribe begins long road to recovery after Hurricane Laura Senators offer disaster tax relief bill Bottom line MORE (La.) and Lisa Murkowski Lisa Ann MurkowskiGOP ramps up attacks on Democrats over talk of nixing filibuster OVERNIGHT ENERGY: House Democrats tee up vote on climate-focused energy bill next week | EPA reappoints controversial leader to air quality advisory committee | Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' House Democrats tee up vote on climate-focused energy bill next week MORE (Alaska).

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All eight voted Wednesday afternoon, along with 43 Democrats, to bring the measure to the floor. Three members of the Democratic caucus who are running for president — Sens. Elizabeth Warren Elizabeth WarrenWarren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon No new taxes for the ultra rich — fix bad tax policy instead MORE (D-Mass.), Amy Klobuchar Amy KlobucharEPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates Biden marks anniversary of the Violence Against Women Act, knocks Trump and McConnell MORE (D-Miss.) and Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.) — missed the procedural vote. They are expected to be back on Thursday for the final up and down vote.

Michael Bennet Michael Farrand BennetOVERNIGHT ENERGY: House Democrats tee up vote on climate-focused energy bill next week | EPA reappoints controversial leader to air quality advisory committee | Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' Senate Democrats demand White House fire controversial head of public lands agency Next crisis, keep people working and give them raises MORE (D-Colo.), who ended his presidential campaign on Tuesday, also missed the procedural vote.

Sens. Tim Kaine Timothy (Tim) Michael KaineBiden promises Democratic senators help in battleground states Second GOP senator to quarantine after exposure to coronavirus The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep MORE (D-Va.) and Dick Durbin Richard (Dick) Joseph DurbinMcConnell focuses on confirming judicial nominees with COVID-19 talks stalled Senate Republicans signal openness to working with Biden Top GOP senator calls for Biden to release list of possible Supreme Court picks MORE (D-Ill.) introduced the resolution after Trump in January ordered a drone strike that killed Gen. Qassem Soleimani, the leader of the Islamic Revolutionary Guard’s elite Quds Force.

The attack prompted a retaliatory Iranian missile strike against two bases in Iraq that house U.S. troops, more than 100 of whom were left with brain injuries.

The unexpected move to take out Soleimani, a revered figure in Iran, was seen by many experts as a provocation that could lead to a wider regional conflict. It put Congress in a state of high alert until Trump tweeted that he did not expect any further escalation.

Republican senators who support the resolution have taken pains to remove references to Trump, in order to avoid the appearance of taking a shot at the president.

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But their defiance shows that foreign policy has become a major source of friction between the president and some members of his party.

Senate Republican Whip John Thune John Randolph ThuneThe Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump contradicts CDC director on vaccine, masks Senate GOP eyes early exit MORE (S.D.) said, “You’ve got members of ours who traditionally have held the view that you don’t want to be involved in foreign entanglements.”

“And then we got other members ... who think that constitutionally Congress needs to claw back some more of the powers we’ve given up to the executive when it comes to where and when we deploy American power around the world,” he said.

“It’s evidence that there are folks in our caucus who on foreign policy and national security matters come down in a slightly different place,” he added.

The wave of GOP defections is all the more remarkable after Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellMcConnell focuses on confirming judicial nominees with COVID-19 talks stalled McConnell accuses Democrats of sowing division by 'downplaying progress' on election security Warren, Schumer introduce plan for next president to cancel ,000 in student debt MORE (R-Ky.) came out strongly in opposition to the measure.

The GOP leader on Tuesday called the resolution “deeply flawed on a number of levels.”

He called it an overly aggressive interpretation of the 1974 War Powers Act that would go too far in tying the president’s hands in responding to national security threats.

“It is too blunt and too broad. It is also an abuse of the War Powers Act, which was designed to strike a balance between the President’s constitutional war powers and Congress’s own war powers and oversight responsibilities,” McConnell said on the floor.

McConnell drew a parallel between the Democratic effort to impeach Trump and remove him from office to this week’s attempt to limit his war powers.

“No patience for ordinary oversight; just rush to grab the bluntest tool available to make a political statement against the president,” he said.

“Well, this war powers debate bears an eerie resemblance to that pattern,” he added, referring to the recently concluded impeachment effort.

While Republican lawmakers have been reluctant to criticize Trump’s conduct — as evidenced by all but one GOP senator voting to acquit the president on both articles of impeachment — they have been more willing to fight over the balance of power between the White House and Congress.

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Young, a Republican co-sponsor of the resolution, said, “I think it’s important that Congress consistently affirm our support for our troops. There’s no better way to do that than casting our vote to authorize force when necessary.”

The Senate voted in March to direct the president to stop U.S. military support of a Saudi-backed coalition fighting in the civil war in Yemen. Seven Republicans broke party ranks to support the resolution: Lee, Collins, Moran, Murkowski, Paul, Young and Sen. Steve Daines Steven (Steve) David DainesSenate Democrats demand White House fire controversial head of public lands agency Pence seeks to boost Daines in critical Montana Senate race The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump, Biden renew push for Latino support MORE (R-Mont.).

Daines, who is up for reelection this year in a solidly pro-Trump state, is the only Republican who has dropped off the bloc of GOP senators who want to rein in the president’s war-making powers.

Although Trump vetoed last year’s resolution, proponents of the measure argued it had an effect because the administration stopped refueling Saudi warplanes after Congress acted.

Thursday’s rebuke of Trump’s war powers vis-a-vis Iran will, too, be viewed as largely symbolic.

Trump is expected to veto the measure, and GOP leaders say there aren’t 67 votes in the upper chamber to override him. A similar bill passed earlier this year by the House is a concurrent resolution and will not go to Trump’s desk.

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“They’re not going to be at the requisite number to actually succeed in the end,” said Thune.

Paul, a staunch Trump ally, says he is motivated to restore Congress’s constitutional powers.

He argues that the White House merely feels obliged to consult with Congress ahead of a major military action and doesn’t feel any real constraint from launching strikes.

“It’s not supposed to be about advice, it’s supposed to be about permission. The Constitution says we go to war with the permission of Congress,” Paul said.

Paul believes it’s important to retrench the president’s war powers after an authorization for the use of military force passed by Congress shortly after the Sept. 11 attacks has been used to justify hostilities around the world for nearly 20 years.

The 2001 authorization states the “president is authorized to use all necessary and appropriate force against those nations, organizations, or persons he determines planned, authorized, committed or aided the terrorist attacks that occurred.”

“When we went to war in 2001, it was very clear cut. It was sixty words. It says nothing about association forces. It says nothing about 50 different wars in Africa or throughout the Middle East,” Paul said.