The #JohnMcCainDay hashtag went viral on Twitter Friday as thousands of people trolled President Donald Trump on his birthday.

Andy Lassner, executive producer of “The Ellen DeGeneres Show,” called on his hundreds of thousands of followers to help Trump celebrate turning 73 by making the name of the late GOP Arizona senator trend.

“Honoring an American hero today,” Lassner wrote.

“I’m sure this would mean a lot to patriot like Donald Trump,” he sarcastically added.