Barack Obama was on fire this weekend stumping for his former VP in Michigan -- and that's no coincidence seeing how he was in the GROOVE after sinking a trey beforehand.
Prior to Joe Biden's Detroit rally, Barack was putting up shots in the Northwestern High School gym -- and right before showtime ... he threw up a beauty from the far right corner, and watched it fall cleanly. Quite the impressive feat, and BO was clearly feeling himself.
The crowd cheers and someone in the distance says "Walk off!