Former Obama adviser David Axelrod didn't take kindly to President-elect Donald Trump's remarks at a pre-inauguration event Thursday about his visit to the Arlington National Cemetery.

"Arlington National Cemetery today ... it was so beautiful. So many people. So many people," Trump reportedly said at the Candlelight Dinner in Washington, D.C., after he participated in a wreath-laying ceremony at the military cemetery in Virginia earlier in the day.

Axelrod, who worked as a chief strategist for Obama two presidential campaigns, reacted in disgust to Trump's comment.

"My god, it's a cemetery!!! Filled with fallen heroes!" Axelrod said on Twitter.