Really, TTT, Donald Trump is far more of a threat to your views than he does help them. He's far too blustery, confrontational and, well, full of crap to be taken seriously. So if by some freak result he does end up winning the nomination it's virtually certain that he'd be utterly pummelled in the actual vote by Hilary Clinton. That's a double disaster as firstly it sets the Republican party back potentially another decade and secondly it lets Hilary Clinton in on a cakewalk, and to say the least she isn't universally popular in the US and ought to be held to more scrutiny than Trump can hope to provide.
The candidate you *should* be backing is Ted Cruz, who is in many ways a scaled-down, sensible version of Donald Trump. I won't waste too much time summarising his various policy positions -- do your own research -- but I think I'm safe in saying that you'd like him a lot. And what is more he's not a complete jerk, and looks capable of adapting well to presidential office in a way that Trump never could.
Him or Marco Rubio, both of whom would have the credentials to take on either of the two contenders the Democrat party has to offer. At the moment, both are massively outshone by Trump, but I doubt that will last too much longer.