“Ronald Reagan had a history of core principles that he never deviated from.”
He actually did — but in a good way. In his younger years he was pro-union and was head of one of the actors’ unions — maybe SAG. Later, he defied a strong union when he fired the air traffic controllers.
People change their minds and their lives for all kinds of reasons and at different times in their lives. If the apostle Paul were running for office now, the negative ads would not be pretty.