Presumptive 2020 Democratic presidential nominee Joe Biden named U.S. Sen. Kamala Harris (D-Calif.) as his running mate on Tuesday.

“I have the great honor to announce that I’ve picked @KamalaHarris — a fearless fighter for the little guy, and one of the country’s finest public servants — as my running mate,” Biden tweeted. “Back when Kamala was Attorney General, she worked closely with Beau. I watched as they took on the big banks, lifted up working people, and protected women and kids from abuse. I was proud then, and I’m proud now to have her as my partner in this campaign.”

Harris, who suspended her presidential campaign in December 2019, is the first Black woman on a major party’s ticket.

The Trump campaign responded to Biden’s pick with the following statement: “Joe Biden is no moderate, and with Harris as his ‘political living will,’ he is surrendering control of our nation to the radical mob with promises to raise taxes, cut police funding, kill energy jobs, open our borders, and appease socialist dictators.”

The Democratic National Convention begins next week on August 17. The Republican National Convention will be held the following week, starting on August 24.