Obama and Biden walk through the Crypt of the Capitol. Photo: J. Scott APPLEWHITE/AFP via Getty Images

Former President Obama is expected to make his first in-person campaign stop for Joe Biden next Wednesday, Oct. 21, in Philadelphia.

The state of play: With 18 days until the election, the former president plans to visit a handful of critical battleground states. Obama is expected to make joint appearances with Biden and Sen. Kamala Harris in the final stretch of the race, the Atlantic reports, and will concentrate on states with early voting.

  • “He’s doing enough for our campaign,” Biden told reporters on Tuesday, leaking plans for the former president's campaign efforts. “He’ll be out on the trail.”

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Trump campaign announces $55 million ad buy in final two weeks

President Trump holds up a MAGA hat in Des Moines, Iowa on Oct. 14. Photo: Alex Edelman/AFP via Getty Images

The Trump campaign and Republican National Committee plan to spend an additional $55 million on coordinated ad buys in the remaining two weeks of the 2020 election, campaign manager Bill Stepien told reporters on a Monday call.

What to watch: The campaign and the RNC will jointly target Arizona, Iowa, Wisconsin, North Carolina, and Michigan — all considered critical swing states. RNC chair Ronna McDaniel told reporters on a Monday call that one ad would target Joe Biden's health care plan.

Obama at voting drive: "We can come out of this moment stronger than before"

A screenshot of former President Barack Obama from the Pull Up & Vote Party. Photo: Complex/YouTube

Former President Barack Obama said while urging people to vote for Joe Biden at the virtual Pull Up & Vote Party voting initiative Tuesday he found it "inspiring" that young Americans were organizing and "fighting for change."

The big picture: "We can come out of this moment stronger than before," Obama said. "In times as polarized as these, your vote doesn’t just matter, it matters more than ever before. .. "Let's go win this thing." The event, hosted by activist Tamika Mallory and featuring a host of celebrities, was designed to encourage engagement and voter turnout in November's election.

Go deeper: AOC and Ilhan Omar draw 400,000 to Twitch stream to get out the vote

The top Republicans who aren't voting for Trump in 2020

Photo: Brendan Smialowski/AFP via Getty Images

Maryland Gov. Larry Hogan said last week that he cannot support President Trump's re-election.

Why it matters: Hogan, a moderate governor in a blue state, joins other prominent Republicans who have publicly said they will either not vote for Trump's re-election this November or will back Biden.