Washington: US House Speaker Paul Ryan said he was not ready to support the campaign of presumptive GOP presidential nominee Donald Trump. "I'm just not ready to do that at this point. I'm not there right now," Xinhua news agency quoted the top House Republican and 2012 Republican vice presidential nominee as saying on Thursday. Despite Trump's recent pledge to unify the GOP after his bombastic style and incendiary remarks had alienated many within the party, Ryan on Thursday took implicit jabs at the presumptive GOP standard-bearer, urging Trump to run a campaign that would allow Americans to "have something that they're proud to support and proud to be a part of". "We've got a way to go from here to there," said Ryan. Ryan's position had so far made him the highest-level Republican official to reject Trump's campaign since the New York billionaire developer won Indiana on Tuesday and forced his last two competitors out of the race.