In 2020 Pennsylvania conducted an election using mail-in ballots and drop boxes devoid of even basic provisions to ensure electoral integrity. A committee looking at the election afterward found in excess of 200,000 ballots that seemed to have come out of thin air. Nobody knew who cast them.
IMHO the GOP Establishment is fine with stolen elections; which means that they're probably beneficiaries of the same corrupt process. This is the only logical reason why purported Republicans and the state and national level have demonstrated purposeful indifference to election fraud generally, and 2020 in particular.
Somewhere in a back room, the Dems and the GOP select winners and losers and divvy up the spoils (at least for those races they care about) ... or get together to receive instructions from whoever controls them as to who will be winners and losers in particular races.
More here: https://www.trevorloudon.com/2022/01/deductive-reasoning-the-gop-was-in-on-the-steal/
All I can assume is that each and every one of them, that doesn't secure the vote, is sitting in their position because of the rigged system. There is no other reason I can think of to NOT correct the fraudulent practices.