Republican presidential candidate Donald Trump waves as he arrives on his plane before he speaks at a campaign rally, Saturday, June 11, 2016 at a private hanger at Greater Pittsburgh International Airport in Moon, Pa. (AP Photo/Keith Srakocic)

WASHINGTON (AP) - The Latest on the 2016 presidential campaign (all times Eastern Daylight Time):

11 a.m.

House Speaker Paul Ryan is leaving open the possibility of taking back his endorsement of Republican presidential candidate Donald Trump.

The Wisconsin Republican tells ABC's "This Week" that he doesn't want to "speak about what's happening in the future."

He adds, "I believe and hope that he's going to change and improve his campaign. We'll see."

Ryan's remarks come as he defends his endorsement of the billionaire developer, who has won more than enough GOP delegates to clinch the party's presidential nomination. The speaker's comments echo Senate Majority Leader Mitch McConnell's implicit warning that he's not going to "speculate" on the future of his own endorsement of Trump.

Both leaders, and scores of other Republicans, have denounced Trump's remarks on the race of various people, including that of the judge overseeing lawsuits against Trump University. They also do not back Trump's proposal to ban Muslims from the U.S. for an indefinite time.

But both Republican congressional leaders, plus Trump's more enthusiastic endorsers, say Trump would be a better president than probably Democratic nominee Hillary Clinton.


10:15 a.m.

Donald Trump's top supporter in the Senate says it was a "rough week" for the presumptive Republican presidential nominee because it got the candidate off message.

Trump was hounded by Republicans and Democrats for saying a federal judge overseeing a Trump-related case might be biased against Trump because of the judge's Mexican heritage.

Sen. Jeff Sessions - in an interview with "Fox News Sunday" - calls it "one off-the-cuff comment that he probably shouldn't have made."

The Alabama lawmaker says he expects Trump to refocus on the need for change. Sessions says "this man communicates. He's talking about the issues people care about."

Sessions says those issues include unfair imports and excessive immigration that takes jobs away from Americans and pulls wages down.


10:08 a.m.

Hillary Clinton's campaign is out with its first general election ad.

The ad splices clips of Donald Trump threatening protesters and mocking a disabled reporter with scenes of Clinton visiting factories, greeting diverse groups of voters and stepping off a plane as secretary of state.

She ends the one-minute spot saying: "What kind of America do we want to be? Dangerously divided or strong and united? I believe we are always stronger together."

Trump has been quick to respond. On Twitter, he wrote: "Clinton made a false ad about me where I was imitating a reporter GROVELING after he changed his story. I would NEVER mock disabled. Shame!"