I don't know who is worse, Oz or McCormick. I will vote for either in the general only because they have to be better than any Democrat. All my life I have had RINO senators: Arlen Spector and Pat Toomey. I am well exercised in writing and calling their offices because they don't know how to vote conservatively. I fully expect that to continue. So I am used to it, but I don't like it.
Just an aside, my congresscritter is Scott Perry, who is chairman of the House Freedom Caucus. I write and call his office, but more often than not I convey my thanks for his conservatism. That's what I want for my Senator.