Vice President Harris campaigned in Pennsylvania to make a final push on Election Day eve, hoping momentum can help her break ahead in the must-win Keystone State.

Harris on Monday traversed Pennsylvania, which carries the prize of 19 electoral votes and is considered the most critical battleground state to win.

“We’ve got one day left to get this done so now, we work to get out the vote,” Harris said at her rally in Pittsburgh. “Let’s reach out in these next 24 hours to family and friends and classmates and neighbors and coworkers.”

Her running mate, Gov. Tim Walz (D-Minn.) earlier told the crowd in his remarks, “This thing is tied. But we’ve got the damn ball.”

Harris was introduced by Cedric the Entertainer and after remarks, artist Katy Perry sang “Dark Horse”—interjecting “we ain’t going back!”

Between her rallies in Allentown and Pittsburgh, Harris personally knocked on doors to reach voters in Reading, Pa.

“We need everyone in Pennsylvania to vote because you are going to make the difference in this election,” Harris said on a swing through Allentown.

“Allentown, this is it. Just one more day … left in one of the most consequential elections on our lifetime and momentum is on our side,” she said. “Can you feel it? We have momentum, right?”

Harris also argued momentum was on her side during a rally in Michigan on Sunday night. Her visit to Pennsylvania rounded out her focus on the "blue wall" states after she campaigned in Wisconsin on Friday.

“Pennsylvania, you know me. I am not afraid of tough fights, evidently,” Harris said.

“We are the promise of America, we, everyone here … and I see it, I see it in the fathers and the mothers and the grandparents who work hard every day for the children’s future,” she said, also calling out first time voters in the audience.

The vice president called out the Puerto Rican community in Pennsylvania, which is home to more than 400,000 people born in Puerto Rico or of Puerto Rican descent.

“I stand here proud of my longstanding commitment to Puerto Rico and her people and I will be a president for all Americans,” she said.

Harris also visited a Puerto Rican restaurant in Reading, Pa., joined by Rep. Alexandria Ocasio-Cortez (D-N.Y.) and Pennsylvania Gov. Josh Shapiro (D).

Her campaign has highlighted a racist remark by comedian Tony Hinchcliffe, who spoke at a Trump rally last Sunday in New York’s Madison Square Garden. Hinchcliffe referred to Puerto Rico as a “floating island of garbage.”

Fat Joe spoke before Harris and Elizabeth Strong, a local business owner of Puerto Rican descent, introduced her. Shapiro, who was considered a front-runner for Harris’s running mate, also spoke at the rally.

A New York Times/Siena College poll of battleground states published Sunday showed former President Trump and Harris were tied in Michigan, as well as in Pennsylvania. Trump has a 0.7 percentage point lead over Harris in Pennsylvania, according to Decision Desk HQ/The Hill’s aggregate polling.

Updated at 9:30 p.m. EDT