Minority Leader Mitch McConnell (R-KY) made the shocking decision to recommend Republicans block the advancement of the Senate pro-migration border bill.
That first procedural vote was set for Wednesday. It is unknown if Majority Leader Chuck Schumer (D-NY) will forge ahead, although that is likely.
McConnell cited the overwhelming number of Senate Republicans planning to vote against the measure either on substance or because they wanted more time, according to Punchbowl News.
The longtime Republican leader has spoken in favor of the deal and did not express any personal hesitations about the legislation to his colleagues.
According to Punchbowl, McConnell said the political mood in the country has changed since negotiations began months ago. At that time, McConnell and Democrat leaders agreed to pair foreign aid to Ukraine, of which McConnell is the Senate’s greatest champion, with a border compromise.