Barack Obama hasn’t endorsed his former vice president, Joe Biden. But you wouldn’t know that from watching Biden’s newest campaign ad.

“We all know that on its own, his work does not capture the full measure of Joe Biden,” Obama says in the ad, piano music lightly rippling in the background as black and white images of the former vice president flash on the screen, before calling Biden “a resilient and loyal and humble servant.”

“The best part is,” Obama says in closing, “he’s nowhere close to finished.”

The ad, stitched together from Obama’s speech presenting Biden the Presidential Medal of Freedom before they left office together in January 2017, is part of Biden’s closing argument in the days leading up to the Iowa caucuses on Feb. 3. It’s a way to convince Democratic voters that they should put him in the Oval Office because Obama — the most popular figure in the party — put him a heartbeat away from it.