I doubt anybody among the Dems, or even among the thinking elected republicans left (not of the Trump cult) have any fears or even more than chuckling consideration of the possibility, Trump could turn a new leaf and demonstrate in the virtues of conservatism. It is simply not the nature of that populist dick-head, and it should be noted, populism and conservatism are not compatible concepts, being somewhat mutually exclusive. An example of populism over conservatism being his new-found views on abortion, a perfect example of political populism, but not in keeping with conservatism. The man will say or do anything to advance himself over whatever conservative values, committed conservatives, GOP committed, or our worldwide allies would recognize as the conservative stance.