“have our President’s re-election in mind for a moment when davening”
Any Jew who prays for Trump’s re-election has rejected everything the Torah teaches.
“the usual tefillah after the haftorah for the leaders of our government”
Why? We were willing to bring Korbanot in the Beit HaMikdash for Caligula, who was even worse than Trump. (And Trump is really bad.) He needs our prayers.