Now Canadian Prime Minister is letting POTUS, FLOTUS and the Royal Family know what time it is in a new video just posted to Twitter.

In the clip, the Canadian prime minister joins Canadian Olympians for a one-handed pushup before ceremonially dropping the mic. Hmm, maybe you could challenge him to a free-throw contest, Barack?

A healthy rivalry has emerged between our three nations in the run-up to the Invictus Games this weekend—first Barack and Michelle taped a funny "challenge."

And then Prince Harry and Queen Elizabeth served them right back.

Founded by Prince Harry, the Invictus Games feature injured and disabled service members competing in athletic challenges. Harry is hanging out with Trudeau today to help promote the games, which start May 8 in Orlando.

Below, Trudeau issues his challenge en francais.