the average voter doesn’t know who Cruz is.... if he gains any traction the media will begin to destroy him...... he would get fewer votes than Romney by far
Trump is not perfect, but he's a known commodity to most Americans. Shrillary, or whomever the Dems nominate, will not be as successful running a negative campaign again The Donald.
I actually wish there was a viable 3rd option - the Conservative bonafides of a Cruz, with the media savvy (& teflon) of a Trump - but that's a pipe dream with the current crop of candidates.