Jon Stewart reunited with his longtime cohort Stephen Colbert on The Late Show to share some thoughts on Donald Trump's first days as president.

The former Daily Show host began his segment with a dead animal on his head ("The president sets men's fashion") before mocking Trump & Co.'s recent plans on building a border between Mexico (he said Trump will have China send us the Great Wall of China) and his team's way of addressing the public and facts in general ("I, Donald J. Trump, have instructed my staff to speak only in bullshit").

Stewart broke character for a moment, saying, "It has been 11 days, Stephen. Eleven fucking days! The presidency is supposed to age the president, not the public."

But he did end by revealing one of Trump's upcoming (though fake) "executive orders" that was actually a rallying call. "We have never faced this before," he told the audience. "Purposeful, vindictive chaos...no one action will be adequate. All action will be necessary. And if we do not allow Donald Trump to exhaust our fight, and somehow come through this presidency calamity-less and constitutionally partially intact, then I, Donald J. Trump, will have demonstrated the greatness of America—just not how I thought I was gonna."

Watch the clip above.