According to multiple reports, including one from the Washington Post, the Senate Majority Leader Mitch McConnell from Kentucky said in a closed-door meeting that he does not have enough votes to knock down an effort to call more witnesses and evidence in the Senate impeachment trial of Donald J. Trump.

This week, excerpts of a manuscript by former national security adviser John Bolton were released stating that President Trump directly tied the withholding of almost $400 million in military aid to Ukraine, to requested investigations of former vice president Joe Biden and his son Hunter Biden. 

As the Associated Press reports, Republicans familiar with the closed-door meeting of GOP senators said the meeting began not long after closing arguments were made Tuesday by Trump's legal team. McConnell reportedly faces a number of potential defections in the party. 

51 votes are needed before a decision to call more witnesses would happen. Republicans hold a 53-seat majority in the Senate. 

RELATED: Impeachment trial not fair and impartial, analyst says

RELATED: Profiling progressive corruption with author Peter Schweizer