Donald Trump has dealt with more than his fair share of protesters at campaign rallies. But while speaking to a crowd in Kissimmee, Fla., Thursday night, the Republican nominee experienced a new breed of demonstrator.

Security removed a heckler from the audience during Trump's speech, but before the man could be removed, he yelled out, "You love Russia. You're Putin's b—-h."

The crowd erupted in defense of the billionaire businessman. Trump had only one word in his immediate response to the heckler, "Goodbye."

"Where the hell did he come from?" Trump added.

The GOP nominee has been criticized in recent weeks for calling on America to improve its relations with Russia. Democrats alleged Trump and Russian President Vladimir Putin colluded in the Democratic National Committee server hack in order to hurt Democratic nominee Hillary Clinton's chances of winning in November.

"I get a lot of heat over Russia. Wouldn't it be nice if we actually got along with Russia?" Trump told attendees before concluding the rally.