Former White House press secretary Ari Fleischer noted in a recent op-ed that he'll leave his ballot blank and not vote for either Trump or Clinton.

Back in May, former White House press secretary Ari Fleischer tweeted, "There's a lot about Donald Trump that I don't like, but I'll vote for Trump over Hillary any day."
Now, he seems to have changed his mind based on a Washington Post op-ed on Friday.
Fleischer notes he was one of the few individuals from the Bush administration who supported Trump but during the campaign, "...Trump lost control of himself and his message. He veered recklessly off track, attacking an American judge for his Mexican heritage, criticizing a war hero’s family, questioning the legitimacy of the election and otherwise raising questions about his judgment. If this race were about change, Clinton or policy, Trump could win it. But he made it about himself. Because he is one of the most unpopular people ever to run for president, that was a big mistake."
Fleischer also says, "Nothing will change if Clinton is elected, and that’s the problem...Clinton ran to Sen. Bernie Sanders’s left to win the Democratic primary, so why trust her now to move to the more sensible center? Then again, because she is so unprincipled, that’s probably exactly what she’ll do. For the Iraq War. Against the surge. Open borders. Closed borders. Against trade deals she used to support. What difference does it make? This is who Clinton is. It’s why she is also among the most unpopular people ever to run for president."
As far as what he'll do on Election Day, Fleischer notes, "On Tuesday, if someone puts a gun to my head and tells me to make a choice, I’ll say 'shoot.' I will vote for Republicans up and down the ballot. But when it comes to the presidency, I’m going to leave my ballot blank."