Former presidential candidate Mitt Romney will vote for Texas Senator Ted Cruz, saying he is "repulsed" by Republican front-runner Donald Trump. Mr Romney said in a Facebook post that the only way to nominate a Republican is to have an open convention, in which party officials choose the nominee. He campaigned with Governor John Kasich in Ohio but said voting for Mr Cruz is the only way to stop "Trumpism". -snip- "Mitt Romney is a mixed up man who doesn't have a clue. No wonder he lost!" Mr Trump said on Twitter. -snip- "Today, there is a contest between Trumpism...