Yes McConnell can but won't. McConnell is just a weak being when it comes to hitting hard with the RINOs.
McConnell won’t because he doesn’t want to give the Democrats precedent like they did with the nuclear option on judges. What he doesn’t comprehend is the Democrats could care less,if they have the votes or the power legal or otherwise they do it.
Flake should be considered persona-non-grata by the Republican party at the state and federal level and given no preference or favors. He is truly the span of the devil McCain.