Thirty years ago I would have preferred a Jewish politician
Back then a secular Jewish politician was more likely to identify with Jewish causes even frum ones than a non-Jewish politician. There were exceptions even back then NYS Senator Alfonzo Demato was a lot closer to the frum community than his liberal Jewish opponents . But on the whole it was true Rav Moshe Feinstein left his hospital bed to visit the hospital bed of totally secular Jewish NYS senator Jacob Javits as hakoras hatov for all that he did for K’llal Yisroel.
Today on the other hand, no way! Not only would I not be more likely to vote for a secular Jewish politician over his non-Jewish opponent even a frum Jewish politician is questionable. If it was a frum Democrat running against a non-Jewish Republican I would almost certainly vote for the non-Jewish Republican candidate.