The Late Show host Stephen Colbert blasted Donald Trump’s response to the terrorist attack in Orlando, Florida during a Tuesday night sketch in which he drew a swastika to visually connect some of the things the presumptive GOP presidential nominee said during a national security-focused speech the candidate delivered on Monday.

Colbert opened the segment by praising the ways in which communities around the country have come together in the wake of the attack, which left 49 people dead and another 53 injured when a gunman who reportedly pledged allegiance to the Islamic State opened fire at the gay nightclub Pulse.

But the host quickly turned his focus to Trump, and in particular, to the candidate’s national security address delivered Monday in the wake of the attack.

“This whole speech, with its nativism, its fear-mongering and especially its self-aggrandizing in the face of tragedy feels like a new low,” Colbert said. “It makes me long for the days when Trump was just bragging about the size of his penis. Donald, can’t we just put the focus of your campaign back on your genitals?”

Colbert also took issue with Trump’s comments about President Obama in the wake of the attack, in which he said he would let the American people “figure out” why Obama was angrier at him than he was at the Orlando terrorist.

“Let the people figure it out,” Colbert repeated. “He’s just going to give you clues, like the$100,000 Pyramid. Your clues are ‘Obama’ and ‘something going on… Uh, uh uh… ‘What my racist aunt would say at a picnic!'”

Colbert then walked over to a chalkboard prepared with some of the phrases from Trump’s speech, including “Trump,” “Obama,” “Something Going On” and “Bad Thing.”

As he began to connect the phrases, it became clear that the Late Show host was drawing a swastika.

“That can’t be right,” Colbert said, erasing the swastika and replacing it with a circle with several lines running through it.

“At the center of it all, there’s gotta be an answer, and I don’t know what it is,” he added, pointing to the middle of the circle. “But I hope Trump explains it soon. Because until he does, that kind of looks like he’s an a**hole.”

Watch video of the segment above.

Follow Daniel Nussbaum on Twitter: @dznussbaum