US President Donald Trump ridiculed Beto O'Rourke just hours after the Democratic presidential hopeful ended his campaign.
The president used profanity to describe his rival and said he "gave up like a dog."
Mr. O'Rourke, a former Texas congressman, was highly critical of Mr. Trump after the mass shooting in his hometown of El Paso in August.
He called the bloodshed a "consequence" of Mr. Trump's anti-immigrant rhetoric.
On Friday, Mr O & # 39; rourke said he was giving up the White House race because his campaign did not "mean going forward."
Mr Trump's response came days after he claimed that Islamic State (IS) leader Abu Bakr al-Baghdadi had "died as a dog" during a US military operation in northwestern Syria.
Speaking at a rally in Tupelo, Mississippi, the president labeled Mr. Rourke a "poor, pitiful man."
What did Trump say?
"He came out of Texas with very hot political ownership and came back as cold as you can," Mr. Trump
Previously, he mocked Mr. O'Rourke on Twitter.
He also described former Vice President Joe Biden, the frontrunner for the Democratic nomination, as mentally deficient and said he was "dropping like a rock."
As for the impeachment investigation against him, the president said he believed that an "angry majority" of US voters would support him.
- The story of Trump's impeachment explained
The investigation began because of allegations that Mr Trump had improperly sought help from Ukraine to increase his chances of re-election, which he denies.
How did Mr. O & # 39; Rourke leave?
Announcing the end of his campaign, Mr. O & # 39; Rourke tweeted: "Our campaign has always been seen clearly, spoken honestly and acted decisively.
" In this spirit: declaring that my service to the country will not be as a candidate or as a nominee. "
In a blog post thanking supporters, he wrote:" We ran into institutional, systematic racism and called out to Donald Trump for his white supremacy and violence which he promotes to communities that do not resemble, pray or love like the majority in this country "
Democratic fr. intruders tweeted their homage to Mr. O & # 39; rourke after he stood aside.
Mr Biden said he had inspired many.
Elizabeth Warren praises his "commitment to ending gun violence" while Bernie Sanders has his thanks "for running a crowdfunding campaign."
Who is Beta O & # 39; Rourke?
Mr. O & # 39; Rourke, 47, ran for president in March after losing his 2018 bid to remove Texas Sen. Ted Ted Cruz.
In this Senate race, he has performed better than any Democrat in Texas for decades, running a campaign that has stepped up the party across the country and made comparisons to former President Barack Obama.
His passionate delivery, along with his good looks and the origin of a skateboarder and punk rocker, made him a liberal nationwide.
But Mr. Rourke is struggling to bring that energy into the White House race, packed with more than 20 Democratic candidates.
As the initial buzz over his campaign began to fade, the former congressman tried to restart his candidacy.
He began to focus on gun control and vowed to remove assault-style weapons from private property, saying in a television debate: "Hell, we'll take your AR-15s."
But he doesn't it could catch up with frontrunners like former Vice President Joe Biden, Massachusetts Sen. Elizabeth Warren and Vermont Sen. Bernie Sanders.  While launching his campaign, he posed on the cover of Vanity Fair, telling the White House Contest Magazine: "Man, I was just born to be in it."
He later said that regrets this move because it enhances the "perception of privilege".
From Rock Star to Rock Bottom
In just about 12 months, Beto Rourke went from Democratic Rock Star to political rock bottom.
During his 2018 Senate race, the former Texas congressman raised funds as the highest candidate for president. Beloved by Democrats across the country for his youthful energy, his passionate stump speeches have become virtual sensations.
However, his obvious political skills in his native state did not lead to a national scene where the lack of campaign organization and the inability to stand out in a crowded debate cost him dearly.
Mr. O'Rourke's relatively thin autobiography, which did not bother the Democrats when he was confronted by conservative, staunch Ted Cruz in Texas, is also responsible for a game against senators and a former vice president with extensive experience and profound knowledge of politics.
Some hopes of the president could lead to unsuccessful campaigns and to an increased stature among party believers – with more political prospects than when they started. Mr. O’Rourke, whose campaign started high and aimed only down, was not so lucky. He may have a second act in national politics, but his efforts in 2019 will be an experience he will have to overcome, not build upon.