WASHINGTON (REUTERS) - Presumptive Republican presidential nominee Donald Trump said on Wednesday he will probably work with the Republican National Committee to raise US$1 billion (S$1.36 billion) to beat likely Democratic rival Hillary Clinton in the November 8 US presidential election.

"We're going to try and raise over a billion dollars which is what's going to be necessary. The Democrats maybe will get as high as two billion dollars," Trump said in an interview with NBC Nightly News.