Chip Somodevilla/Getty ImagesDonald Trump lashed out at conservative political analyst Bill Kristol on Twitter Sunday after Kristol hinted the businessman could face competition from an independent candidate in November. "Just a heads up over this holiday weekend," Kristol said on Twitter. "There will be an independent candidate--an impressive one, with a strong team and a real chance." The presumptive Republican nominee wasted no time firing back at Kristol: Tweet Embed:https://twitter.com/mims/statuses/737054226833149952Bill Kristol has been wrong for 2yrs-an embarrassed loser, but if the GOP can't control their own, then they are not a party.