"Yes, I think the Republican nominee is unfit to serve as president," Obama said at a White House news conference in a response to a question about whether Trump is fit for the Oval Office. "I said that last week, and he keeps on proving it. The notion that he would attack a Gold Star family that has made such extraordinary sacrifices to our country, the fact that he doesn't appear to have basic knowledge around critical issues in Europe and the Middle East and Asia means that he's woefully unprepared to do this job."
Obama asked Republicans why they're still supporting Trump as their party's presidential nominee.
"I think what's interesting is the repeated denunciations of his statements by leading Republicans, including the speaker of the House and the Senate majority leader and prominent Republicans like John McCain," Obama said at the White House news conference. "The question you have to ask yourself is, if you are repeatedly having to say in very strong terms that what he has said is unacceptable, why are you still endorsing him? What does this say about your party that this is your standard-bearer? This isn't a situation where you have an episodic gaffe. This is daily and weekly where they are distancing themselves from statements he's making."
Obama continued, "There has to be a point at which you say, 'This is not somebody I can support for president of the United States, even if he purports to be a member of my party.' The fact that that has not yet happened makes some of these denunciations ring hollow."
Donald Trump responded to the president's remarks by tweeting, "President Obama will go down as perhaps the worst president in the history of the United States!"
President Obama will go down as perhaps the worst president in the history of the United States!
— Donald J. Trump (@realDonaldTrump) August 2, 2016