Don't believe it. It is a long-standing tactic of the left to pretend to be conservative, because they think that it gives their words more weight when they proceed to then trash the conservative idea, candidate, or policy that they want to attack.
Perhaps a good come-back to that ploy, which would show that you are on to their dissembling, would be to respond with something like, "Nice try, pretender, but a real conservative would actually understand why Trump has so much support!"
Oh, trust me, I’m not fooled, they always fly up the Reagan banner, and I charge in to crush it. Which of course is always followed by Trump is a racist, hates blacks, will nuke everyone, blah, blah, blah.
I’m sure the lines to the cameras would be a mile long if any of it was even slightly true. :)