Well over 50% of the Republican senators view McConnell favorably. That's the only poll that matters.
This is what I was told by my Representative when I wanted him to vote out Boehner. When Boehner won the vote, I got a nasty email from the Rep basically saying, “See? If I’d voted against him, Boehner would’ve taken my committees away from me and I couldn’t represent you well”
Boehner ended up resigning. My Rep. is a jerk.