In her first campaign rally as the presumptive Democratic nominee to face Donald Trump, Vice President Kamala Harris took aim at her Republican rival and a widely derided Trump-linked platform that provides a blueprint for the next GOP administration.

“Donald Trump wants to take our country backward,” she said in remarks from Milwaukee on Tuesday, just two days after President Joe Biden ended his re-election campaign and endorsed his vice president.

Harris, who secured enough delegate pledges to clinch the Democratic Party’s nomination within a little over 24 hours after announcing her candidacy, linked Trump to Project 2025, the Heritage Foundation-backed plan for his administration, and one that his campaign is now furiously trying to distance itself from.

“He and his extreme Project 2025 agenda will weaken the middle class. We know we got to take that seriously,” Harris said. ”Can you believe they put that thing in writing? Read it. It’s 900 pages.”

The plan proposes cuts to Social Security and Medicare, tax breaks to corporations that will force “working families to foot the bill” and abolishes the Affordable Care Act, which “will take us back to a time when insurance companies had the power to deny people with preexisting conditions,” Harris said.