Despite Republican control in the Senate, McConnell faces limits on his ability to steer the impeachment proceedings because the GOP holds a slim 53-47 majority. It takes 51 votes to approve most motions in the proceedings, which means the leader can only afford to lose two Republican senators and still pass his preferred options.
Some Republicans may feel pressure from Democrats to call additional witnesses or expand the proceedings, especially those up for re-election next year in swing states where voters are split in their views of Trump.
McConnell only faces self imposed limits. He is majority leader precisely because he is weak and gives the senate mavericks plenty of room to roam.
Trump still has the right to claim executive privilege. It would split the supreme court with roberts being the tie breaker on the dems side.
Lets try a simple math problem.
What is 47+3?