The Senate will vote Friday on a measure to block President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE from taking military action against Iran without congressional approval.

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellTrump 'no longer angry' at Romney because of Supreme Court stance On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline The Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power MORE (R-Ky.) announced that leadership had hashed out a deal to vote on the proposal from Sens. Tim Kaine Timothy (Tim) Michael KaineHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Democrats call for declassifying election threats after briefing by Trump officials Buttigieg stands in as Pence for Harris's debate practice MORE (D-Va.) and Tom Udall Thomas (Tom) Stewart UdallLWCF modernization: Restoring the promise 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' Senate Democrats demand White House fire controversial head of public lands agency MORE (D-N.M.), and that they would hold the vote open to give 2020 candidates the chance to return from Miami.

“We intend to stay in session this week to finish the NDAA bill and allow for a vote in relation to the Udall amendment. Senators should plan to vote on Friday on the Udall amendment,” McConnell said from the Senate floor, referring to the National Defense Authorization Act.

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He added that “here’s the good news, the vote will start first thing in the morning and be held open into the afternoon to accommodate as many senators as possible.”

The amendment from Kaine and Udall would prevent Trump from using funding to take military action against Iran without congressional approval. Supporters of the amendment argue Trump could still use action without approval if American troops are attacked.

The amendment is unlikely to garner the 60 votes necessary to be added to the NDAA. Even if every Democrat supports the measure, they would still need to win over 13 Republicans.

The decision to delay the vote on the Iran amendment comes roughly a day after Republicans, including McConnell, dismissed the call from Democrats to delay the Iran vote until after the Democratic debates, which are taking place on Wednesday and Thursday night.

"I was incredulous to hear the Democratic leader call yesterday to postpone moving forward with the NDAA. Apparently some of our Democratic friends need to go hit the presidential campaign trail. They can't be here because they have to go campaign," McConnell said.

In a procedural twist, senators are going to pass the mammoth defense bill on Thursday. If the Kaine-Udall proposal gets enough support it will be added to the defense bill retroactively.

Senate Minority Leader Charles Schumer (D-N.Y.) touted the agreement, saying a vote on the Kaine-Udall proposal was "fair and only right."

"Many Americans feel that the constitutional right of Congress to examine foreign conflict and potential war be upheld," he added.

The fight over the Iran amendment had threatened to derail the NDAA, with Democrats threatening to block the defense bill unless they got a vote.

Democrats debated their strategy for more than an hour during a closed-door lunch on Tuesday.