I would wager that very few voters in PA-01 even realize that Brian Fitzpatrick and Mike Fitzpatrick aren’t the same person. Both are RINOs, but Brian is much worse. If you look at the lists of endorsements for both candidates in 2018, you would conclude that there were actually two democRats running.
Mike and Brian Fitzpatrick are the only pro-lifers to have represented the PA-08 during the past 35 years. While they certainly deviate from Republican orthodoxy from time to time (particularly Brian, who has been very disappointing in many votes this Congress), I wouldn’t call them RINOs—there are marked differences between their voting records and those of suburban-Philly Democrats.