We dont need a single Republican Senator to Vote in favor of impeachment. Nope, not one. We simply need to have 30 of them refuse to take part. 30 Republican Senators decide not to defend or condemn the President, and not show up for the final vote.
…..at least if my math is right, 47 Democrats would be a super majority of 70 Senators.
The Constitution requires a supermajority of Senators present. Not The Senate, the ‘Senators present’. So if 30 Republicans ‘sick out’, the 47 Democrats would hold a voting supermajority.