Story highlights Donald Trump on Friday returned to badgering his favorite presidential foe

As Bush's campaign has languished, Trump has repeatedly said that he is tired of talking about him

Washington (CNN) After insisting that enough damage had been done and swearing off future insults toward Jeb Bush, Donald Trump on Friday returned to badgering his favorite presidential foe.

In the fallout of CNN's Republican debate in Las Vegas , Trump has once again taken up needling the former Florida governor. Bush, eager to energize his sagging campaign, brought the fight to Trump on the debate stage, repeatedly talking over the billionaire as the pair tangled.

"I have an idea for @JebBush whose campaign is a disaster. Try using your last name & don't be ashamed of it!" he tweeted Friday.

I have an idea for @JebBush whose campaign is a disaster. Try using your last name & don't be ashamed of it! — Donald J. Trump (@realDonaldTrump) December 18, 2015

".@JebBush has embarrassed himself & his family with his incompetent campaign for President. He should remain true to himself," he said in a series of tweets a few hours later. "The last thing our country needs is another BUSH! Dumb as a rock!"

.@JebBush has embarrassed himself & his family with his incompetent campaign for President. He should remain true to himself. — Donald J. Trump (@realDonaldTrump) December 18, 2015

The last thing our country needs is another BUSH! Dumb as a rock! — Donald J. Trump (@realDonaldTrump) December 18, 2015

As Bush's campaign has languished, Trump has repeatedly said that he is tired of talking about him, preferring to criticize other candidates who pose more immediate threats to his campaign.

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