Because these Pennsylvania voters aren't going to elect a Pelosi clone.
Plus, Democrats are smarter that Republicans are. They allow their candidates to campaign as moderates and then go crazy Left once elected. We make our guys declare crazy right out of the gate or else they get labeled RINOs. "He wanted to ban all abortions without exception AND put gays in prison! How did he lose?"
Name a Republican who has ever governed more conservatively than he or she campaigned, it just doesn’t happen under any circumstance. I can’t think of a single one. I can, however, think of plenty of Democrats who campaigned to the right and governed to the left, it’s practically all of them unless they’re from a very liberal state.
There is a lot of wisdom in that observation and it is from the playbook of Richard Milhous Nixon... “Go right to win the primary, and then go to the center to win the general.”
It may have been a winning formula in 1968, but not so much now. There are NO media outlets that are friendly to a candidate or office holder that champions liberty, common sense, and government that actually operates within the constraints imposed upon it by the Constitution.