Obama criticizes comic's Puerto Rico remarks at Trump's rally

Fencing along the National Mall is still being installed less than 24 hours before Vice President Kamala Harris’ speech at the Ellipse, which is "a large open area surrounded by an oval drive" on the southern side of the President's Park, according to the National Park Service.

Harris chose to deliver her campaign's closing arguments at a symbolic site on the grounds of the White House, where former President Donald Trump delivered a speech on Jan. 6, 2021, that preceded a mob attack on the Capitol.

The permit for the rally estimates a crowd of 20,000 people.

Rally organizers planned an overflow area near the grounds of the Washington Monument.

The Secret Service said in a statement to ABC News that they are “working closely with our federal and local partners to ensure the safety and security of Vice President Harris and all attendees at the campaign event on Tuesday at the White House Ellipse."

Several roads in downtown Washington, D.C., will be blocked off at 6 a.m. Tuesday for the event, which begins at 3 p.m.

Former President Barack Obama responded on Monday to the disparaging comments about Puerto Rico that were made by a comedian who opened for Donald Trump at his rally in New York City over the weekend.

“So, the man holds this big rally at Madison Square Garden, and the warm-up speakers were saying the most – were trotting out and peddling the most racist, sexist, bigoted stereotypes. One guy called Puerto Rico, quote, 'an island of garbage,'” Obama said at a rally in Philadelphia, Pennsylvania, which is home to one of the largest Puerto Rican populations in the U.S.

“These are fellow citizens he’s talking about. Here in Philadelphia, they are your neighbors. They’re your friends. They are your coworkers. Their kids go to school with your kids. These are Americans. They’re people -- and that is the reason why this election should not be close. It should be clear,” he added.

Joining Obama at Temple University's Liacouras Center in North Philadelphia were Bruce Springsteen and John Legend, both of whom performed as part of the When We Vote We Win concert series in support of Vice President Kamala Harris, with eight days to go until Election Day.

Vice President Kamala Harris joined Gov. Tim Walz on the trail for the first time since August in Ann Arbor, Michigan Monday, where she rallied voters ahead of Election Day.

During her stump speech, about a dozen pro-Palestinian protesters interrupted Harris, decrying Israel.

"Hey guys, I hear you on the subject of Gaza," Harris said.

"We all want this war to end as soon as possible and get the hostages out, and I will do everything in my power to make it so," Harris added.

Ann Arbor, located in Michigan's sixth district, was one of the two districts that gained an uncommitted delegate during Michigan's primary, in large part, because of its sizable community of college students.

The other district that gained an uncommitted delegate was the 12th, which included Detroit suburbs with large blocs of Arab-Americans.

-ABC News' Gabriella Abdul-Hakim

Minnesota Gov. Tim Walz delivered a focused message that aimed to rally young voters in the crowd as he stumped for Vice President Kamala Harris in Ann Arbor, Michigan, on Monday.

In an appearance near the University of Michigan campus, with a little over a week before Election Day, Walz delivered a short and thoughtful speech boosting his running mate's candidacy.

“Look, her first day -- from a prosecutor to a district attorney to the attorney general of California to a United States senator to the vice president -- Kamala Harris had that one client: the people," Walz said.

He also, at times, tapped into his "coach" persona. “Now we're moving this thing over the next eight days, an inch at a time, a yard at a time, one door at a time, one phone call at a time," Walz said. "[Because] one of those door knocks, and one of those interactions -- because one or two extra votes for precinct in the state of Michigan will make Kamala Harris the president the United States."

Walz acknowledged head-on the anxiety that young, first-time voters may be feeling during this election cycle.

“Here's the good news: If you're feeling any of that anxiety, any of that nervousness, any of that worry, we've got the solution for you. Get out there and vote for Kamala Harris. I know I did it last Wednesday with my son, who voted [for] the first time, and it works,” he said to the crowd of largely students.

It was Walz's first joint rally with Harris since their appearance in Milwaukee, Wisconsin, during the Democratic National Convention in August.