The rally got here simply days after Mr. Biden gave an handle in Philadelphia warning that Mr. Trump and his allies are threatening to undermine the nation’s democracy, immediately condemning what he referred to as “MAGA Republicans,” citing the Jan. 6, 2021, riot on the U.S. Capitol by Trump supporters. MAGA is brief for Mr. Trump’s marketing campaign slogan, “Make America Nice Once more.”

Democrats maintain slender majorities within the U.S. Home and Senate. Mr. Biden is in search of to show voters’ consideration to Mr. Trump and his allies, whereas highlighting Democrats’ latest legislative victories. Republicans have criticized Mr. Biden’s management and have stated Democrats try to distract from the extra central problems with inflation and financial unrest.

Rep.

Sean Patrick Maloney

(D., N.Y.), the chairman of the Democratic Congressional Marketing campaign Committee that’s tasked with sustaining the celebration’s Home majority, stated on Fox Information Sunday that focus to Mr. Trump and his allies would assist Democrats this fall.

“This election is about mainstream versus MAGA,” Mr. Maloney stated. He defended Mr. Biden’s speech final week in Philadelphia that blasted Mr. Trump and his allies as a risk to democracy. “The purpose of the speech is that mainstream Republicans and Democrats agree on issues prefer it’s incorrect … to steal our nation’s secrets and techniques and maintain them down there on the motel Mar-a-Lago.”

Rep.

Tom Emmer

(R., Minn.), chairman of the Nationwide Republican Congressional Committee that’s attempting to win management of the Home, stated that the “raid on the previous president’s house will not be solely unprecedented, it’s outrageous.” Mr. Emmer additionally urged that the raid would possibly maintain his celebration’s base motivated to vote as a result of authorities focused Mr. Trump and never

Hunter Biden

—whose overseas enterprise dealings have been criticized by Republicans.

Hunter Biden, the president’s son, can be the topic of a federal tax probe. He has stated he was “assured {that a} skilled and goal assessment…will reveal that I dealt with my affairs legally and appropriately.”

“People are pissed off about that,” Mr. Emmer stated. “They’re going to point out up in November, and Democrats are going to reply for it.”

Requested on Fox Information Sunday whether or not the NRCC had suggested GOP candidates to distance themselves from Mr. Trump, Mr. Emmer stated: “Completely not. The president has been a improbable ally of ours.”

On Saturday, Mr. Trump hinted at a potential 2024 presidential bid and referred to as Mr. Biden’s remarks “essentially the most vicious hateful and divisive speech ever given by an American president.”

In a hypothetical rematch of the final presidential election, Mr. Biden led Mr. Trump, 50% to 44%, in keeping with a Wall Road Journal ballot launched final week. The 2 males had been tied in March. The White Home has stated that Mr. Biden intends to run for re-election.

The previous president is underneath scrutiny over his dealing with of presidential paperwork. The FBI search of Mr. Trump’s house on Aug. 8 adopted a year-and-a-half-long effort by federal officers to retrieve tons of of delicate and categorized authorities paperwork. It has raised questions on whether or not the previous president mishandled categorized data and why he retained the data.

In an escalation of its allegations, the Justice Division stated in a courtroom submitting final week that “efforts have been possible taken to impede the federal government’s investigation” and its restoration of the paperwork.

Mr. Trump has filed a lawsuit in search of the appointment of a particular grasp to assessment the supplies seized by the FBI. If accredited, a 3rd celebration—resembling a retired choose—would assessment proof to resolve whether or not it’s protected by attorney-client privilege or related authorized doctrines.

Mr. Trump stated the search “trampled upon my rights and civil liberties” and claimed it will end in a “backlash, the likes of which no one has ever seen.” He additionally painted a darkish image of America underneath Mr. Biden and Democratic management, noting latest murders in Philadelphia.

Keisha Lance Bottoms,

a senior adviser to President Biden, stated Mr. Biden has labored with some Republicans, together with on a gun regulation signed in June.

“The president has all the time stood on the truth that he can work with mainstream Republicans to get issues accomplished on behalf of the American folks,” the previous Atlanta mayor stated on ABC Information’s “This Week.” “Nevertheless it’s additionally going to take for all of us to face as much as hatred and what the president once more continues to say it’s this MAGA agenda.”

Write to Catherine Lucey at catherine.lucey@wsj.com and Joshua Jamerson at joshua.jamerson+1@wsj.com