BEDMINSTER, N.J. -- As rain dumped on his New Jersey golf club, President Trump raged on Saturday, lashing out at his Justice Department on Twitter before welcoming members of a "Bikers for Trump" fan group to the manicured grounds.

Dozens and dozens of gleaming Harleys, Hondas and other motorcycles descended on the central New Jersey property for what had been billed as an outdoor photo-op with Mr. Trump. But pouring rain and flash-flood warnings scrambled the plan, sending soggy bikers inside a crystal-chandeliered club house ballroom, where Mr. Trump signed autographs and posed for selfies and his guests booed reporters.

Late Saturday night, Mr. Trump tweeted some images from the event and wrote "thank you!"

Bikers for Trump at Bedminster earlier today. Thank you! pic.twitter.com/GWN56gYGT3 — Donald J. Trump (@realDonaldTrump) August 12, 2018



It was a classic, chaotic scene reminiscent of his ramshackle early campaign. The president was continuing an extended working vacation away from Washington.

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The day began on Twitter at 8:36 a.m. with a broadside against the FBI, which Mr. Trump accused of stonewalling a public records request for former Deputy Attorney General Andrew McCabe's text messages.

"What are they hiding?" the president asked, threatening that he "may have to get involved" personally in internal FBI business and warning, "DO NOT DESTROY."

Mr. Trump appeared in a better mood when he greeted the bikers, who chanted "Four more years!" and "USA!" as he entered the ballroom. Rain streamed down the windows and pools formed on the empty golf greens outside.

President Trump meets with supporters from a group called "Bikers for Trump" at Trump National Golf Club in Bedminster, New Jersey, U.S., August 11, 2018. CARLOS BARRIA / REUTERS

He quickly pointed out the sopping-wet media, which sparked jeers and calls to "tell the truth." And he thanked the group, saying they'd been with him since the beginning and calling their motorcycles "the most beautiful bikes anyone's ever seen."

He later walked into the crowd of supporters, shaking hands, posing for selfies and signing autograph.

At one point, Mr. Trump returned to the podium to poll those in the crowd on their views of the press, prompting more jeers. One joked that the press pool should be thrown out in the rain.

The president largely ignored reporters' shouted questions, except for one about former White House adviser and reality star Omarosa Manigault Newman and her new book, which includes scandalous - and often unsupported - accusations against Mr. Trump.

The president leaned over and cupped his hand around his mouth as if to whisper.

"Lowlife. She's a lowlife," Mr. Trump said.

He ignored a question about ongoing trade negotiations with Mexico, which prompted some in the crowd to shout, "Build the wall!"

The White House had said about 180 bikers would be attending the event, including military veterans and members of law enforcement agencies, as well as members of the New Jersey chapter of Bikers for Trump, whose members frequently attended Mr. Trump's campaign rallies, sometimes facing off with anti-Trump protesters.

Later, when the rain had eased, Mr. Trump walked outside the residence, where the bikers had gathered with their motorcycles on the drive. He posed for more pictures, stood for the Pledge of Alliance and urged the bikers to rev their engines.

"Let's hear those engines now," he called out, gesturing for them to go louder as the motors roared.

Earlier in the day, Mr. Trump's wrath poured down on Attorney General Jeff Sessions and the president's alleged enemies in the FBI, including ex-FBI Director James Comey, McCabe and Peter Strzok, an FBI agent who was removed from Robert Mueller's probe of Russian interference in the 2016 election after Mueller learned he'd expressed distaste for Mr. Trump in personal text messages.

Why isn’t the FBI giving Andrew McCabe text messages to Judicial Watch or appropriate governmental authorities. FBI said they won’t give up even one (I may have to get involved, DO NOT DESTROY). What are they hiding? McCabe wife took big campaign dollars from Hillary people..... — Donald J. Trump (@realDonaldTrump) August 11, 2018

.....Will the FBI ever recover it’s once stellar reputation, so badly damaged by Comey, McCabe, Peter S and his lover, the lovely Lisa Page, and other top officials now dismissed or fired? So many of the great men and women of the FBI have been hurt by these clowns and losers! — Donald J. Trump (@realDonaldTrump) August 11, 2018



Mr. Trump branded them all "clowns and losers" who had hurt "So many of the great men and women of the FBI."

Mr. Trump also revived his frequent attacks on Sessions, calling him "scared stiff and Missing in Action." He criticized Deputy Attorney General Bruce Ohr, who served as the initial DOJ contact for Chris Steele, the former British intelligence officer commissioned by an American political research firm to explore Mr. Trump's alleged ties with the Russian government.

The big story that the Fake News Media refuses to report is lowlife Christopher Steele’s many meetings with Deputy A.G. Bruce Ohr and his beautiful wife, Nelly. It was Fusion GPS that hired Steele to write the phony & discredited Dossier, paid for by Crooked Hillary & the DNC.... — Donald J. Trump (@realDonaldTrump) August 11, 2018

....Do you believe Nelly worked for Fusion and her husband STILL WORKS FOR THE DEPARTMENT OF “JUSTICE.” I have never seen anything so Rigged in my life. Our A.G. is scared stiff and Missing in Action. It is all starting to be revealed - not pretty. IG Report soon? Witch Hunt! — Donald J. Trump (@realDonaldTrump) August 11, 2018

Mr. Trump marked the one-year anniversary of deadly clashes in Charlottesville, Virginia, with a tweet saying he condemns "all types of racism and acts of violence."

Last year, Mr. Trump said there was "blame on both sides" for the violence that broke out when white nationalists descended on Charlottesville to protest the removal of Confederate statutes and marched through town shouting racist slurs. Mr. Trump said then that the group included "fine people."

In Saturday's tweet, Mr. Trump wrote the "riots in Charlottesville a year ago resulted in senseless death and division."

The riots in Charlottesville a year ago resulted in senseless death and division. We must come together as a nation. I condemn all types of racism and acts of violence. Peace to ALL Americans! — Donald J. Trump (@realDonaldTrump) August 11, 2018

"We must come together as a nation. I condemn all types of racism and acts of violence. Peace to ALL Americans!" he wrote.