Republican donor Meg Whitman has endorsed his rival Hillary Clinton, saying Mr Trump’s “demagoguery” had undermined the national fabric. Senior party activist Jan Halper-Hayes told the BBC she thought Mr Trump was “psychologically unbalanced”. In the latest controversy, Mr Trump has refused to support two senior figures in his own party. In an interview for the Washington Post, he said he was “just not quite there yet” when asked if he would endorse House Speaker Paul Ryan and Senator John McCain. Both men, among the most senior elected Republicans in the country, face primary votes after challenges from within their own party ahead of their re-election bids in November. The two had both criticised Mr Trump’s attacks on the bereaved parents of a US Muslim soldier killed in Iraq, but have both endorsed him for the presidency. The Republican presidential nominee’s ongoing war of words with the parents of Capt Humayun Khan has intensified rifts within the party. US media report that Mr Trump has ignored pleas from his own advisers and senior Republican figures to end the feud with the Khan family. President Barack Obama has questioned why the Republicans have not disowned Mr Trump, saying the billionaire does not have the judgement or temperament to occupy the White House.
