The event is Obama's first stump speech for his former vice president, a welcome sight to Democrats who see the former president as Joe Biden's most potent character witness and a key factor in encouraging Black men, Latinos and younger voters to turn out and vote.

Obama's speech represented his most direct attacks on Trump to date, with the former Democratic leader leveling both substantive critiques -- like questioning Trump's tax policy and handling of the coronavirus pandemic -- and personal barbs, jabbing at shrinking ratings for the President's speeches and town halls.

The remarks drilled down on years of Democratic concerns about the President, with Obama arguing Trump's presidency has not only changed the way other countries view the United States but remade the way Americans feel about politics.