By actively an unequivocally stating he would not vote for the Republican, he is effectively voting for Hillary.
That is not a lie, that is a fact
I have two choices, a box labeled A and a box labeled B. I pick neither. According to your "logic," I've just picked A. Another person following your "logic" could just as well claim that I've "effectively" picked B. According to someone of sound mind, I've picked neither A nor B.
Either you're a little dim and don't understand this (try it out with a couple of toy blocks of different color - first pick one, then the other, and compare/contrast with picking neither), or you're just dishonest.