Amid campaign turmoil, Trump allies urge him to get back on track

In response to the criticism, Trump pledged to focus more on Democratic candidate Hillary Clinton, who emerged from last week's Democratic National Convention with a lead in the polls and who has been consistently attacking him as temperamentally unfit for the presidency.

At a rally in Portland, Maine, on August 4, Trump kept his attention on trying to undermine Clinton's candidacy. He said the fact that she has moved past a scandal over her use of a private email server as President Barack Obama's secretary of state was "probably the greatest accomplishment that she has ever had in politics."

Since formally accepting the Republican nomination two weeks ago, Trump has exasperated many supporters by getting bogged down in a public spat with the parents of an American soldier killed in Iraq and some fellow Republicans.

Billionaire investor Wilbur Ross said he still backed Trump, but urged him to stop engaging in exchanges that benefit the Democrats and make the real estate mogul's behavior the issue in the campaign.

"This election is Donald's to lose and so far the Democrats have been clever about baiting him and he generally has bitten," Ross said in an email to Reuters late on August 3.

U.S. House of Representatives Speaker Paul Ryan, who has endorsed Trump but has not received a reciprocal endorsement from the New York businessman in his re-election bid, told WTAQ radio host Jerry Bader in Green Bay, Wisconsin, that Trump has "had a pretty strange run since the convention."

"You would think we ought to be focusing on Hillary Clinton, on all of her deficiencies. She is such a weak candidate that one would think we'd be on offense against Hillary Clinton, and it is distressing that that's not what we're talking about these days," he said.

Michael Caputo, a former Trump adviser who still supports him, said Trump still has time to right the ship.

Actor and director Clint Eastwood, a prominent celebrity supporter of the Republican Party who appeared at its 2012 U.S. presidential nominating convention, offered an alternative view, saying Trump says some "dumb things" but that Americans should get over it.

At the same time, Trump's lukewarm support for the NATO alliance drew criticism from 37 national security experts from both Democratic and Republican administrations.

Other polls showed Trump down 11 percentage points to Clinton in Pennsylvania and 6 percentage points in Florida, two states that are important to his chances of winning the election.

Speaking with reporters after a Clinton campaign event in Las Vegas, U.S. Senator Harry Reid, the Senate Democratic leader, said he believed traditionally Republican-leaning states such as Arizona and Georgia are going to be competitive this election, and he expects Clinton to campaign there.