It may also be the best. From an article on Why I Support Donald Trump and Not Ted Cruz:

“Conservatism,” as Kirk explained it, encompassed an inherent distrust of liberal democracy, staunch opposition to egalitarianism, and an extreme reluctance to commit the United States to global “crusades” to impose American “values” on “unenlightened” countries around the world. Conservatives should celebrate local traditions, customs, and the inherited legacies of other peoples, and not attempt to destroy them. America, Kirk insisted, was not founded on a democratic, hegemonic ideology, but as an expression and continuation of European traditions and strong localist, familial and religious belief. Indeed, Kirk authored a profound biography of Senator Robert Taft, “Mr. Conservative,” who embodied those principles.

It’s a long article and well worth reading through. Here, however, is the core point on why Trump is preferred to Cruz:

What is needed in this nation now is dramatic, even radical change. What is needed is not someone who will simply raise Hell, but someone who will be more like a bull loosed in a terrified china shop. Half measures and regular politicians, “mainstream conservatives” like Ted Cruz, I don’t think can pull it off. Trump, I believe, just maybe can.

It’s only “just maybe”, but that is all we have.