Former U.S. President Barack Obama teamed up with President Joe Biden to warn of the consequences of Republican gains in midterm elections three days from now that are shaping up as potentially grim for Democrats.

Obama, in a speech to a pumped-up crowd in Philadelphia aimed at boosting Democratic Senate candidate John Fetterman, accused Republicans of resorting to politics of fear.

"They want to scare the living daylights out of everybody,” Obama said. "And most of the time, those fears have a very slender relationship to reality.”