By Ben Kamisar
Presidents George H.W. Bush and George W. Bush, and former GOP presidential nominees Mitt Romney and John McCain
John McCainRepublicans slam 0M 'ransom' payment to Iran McCain: Obama admin ‘made a mockery’ of ransom policy Arizona county at risk of having no ObamaCare option MORE have all decided not to attend the party's convention in July, an apparent rebuke of Trump.
And House Speaker Paul Ryan
Paul RyanRepublicans slam 0M 'ransom' payment to Iran 5 takeaways from Trump’s pick of Breitbart exec as campaign CEO Dem crashes House Republican's interview MORE (R-Wis.) said last week he was not ready to endorse Trump, adding he needed assurances that Trump would champion conservative ideas.
Cruz dropped out of the presidential race last week after losing big in Indiana's primary. John Kasich dropped out a day later, clearing the way for Trump to become the presumptive nominee.
Cruz had hoped a win in Indiana could give him momentum into Tuesday's Nebraska contest, but Trump emerged from the Hoosier State as the only candidate with a viable path forward.

