President Trump was quick to take to Twitter on Wednesday night where he criticized former New York City Mayor Mike Bloomberg's performance during his first Democratic debate.

'Mini Mike Bloomberg's debate performance tonight was perhaps the worst in the history of debates, and there have been some really bad ones,' Trump tweeted.

'He was stumbling, bumbling and grossly incompetent. If this doesn't knock him out of the race, nothing will. Not so easy to do what I did!'

The President also lambasted Bloomberg while at an Arizona campaign rally.

The Democratic showdown Wednesday night in Las Vegas repeatedly put Bloomberg in his primary rivals’ crosshairs as the billionaire made his debate-stage debut

President Trump lambasted former NYC mayor Michael Bloomberg's debate performance calling it 'one of the worst in the history of debates'

'I hear he is getting pounded tonight,' Trump said as he spoke while the debate was in progress.

Later in the rally, speaking of Bernie Sanders, Trump asked the crowd: 'How's he doing tonight?'

The president also repeated some of his tweets mocking Bloomberg's height during the rally.

'He spent $500 million so far, and I think he has 15 points,' Trump said as he attempted to downplay the prospect of being outspent by the billionaire.

'My father would teach me if you can spend less and win, that's better than spending a lot.'

Trump finished his speech in Phoenix just as Democrats were wrapping up their debate in Las Vegas.

President Trump laid into Bloomberg during a campaign rally in Arizona. 'I hear he is getting pounded tonight,' Trump said as he spoke while the Democratic debate was in progress

Wednesday's debate was the ninth of the Democratic primary contest and the last before voters in Nevada head to caucuses on Saturday.

Most of the fire at the Democratic presidential debate in Nevada was aimed at Bloomberg, the newcomer on the stage.

After spending more than $300 million of his fortune on a massive ad campaign that boosted his poll numbers and landed him on the debate stage, he was torched from every angle.

Bloomberg was forced to defend, among other things, his massive wealth, New York's 'stop-and-frisk' policing program and the treatment of women at his media company.

After spending more than $300 million of his fortune on a massive ad campaign that boosted his poll numbers and gained him entry to the debate, Bloomberg was torched from every angle

He was even booed at one point by the Democrat-friendly crowd in Las Vegas.

At times he seemed distant and disinterested. His best moments came when he was talking about building his company and positioning himself as an ardent defender of capitalism, but such moments were few.

Bloomberg stepped on stage prepared for the attacks, which his rivals had been foreshadowing for days. Yet the former mayor and business mogul still appeared to be caught off guard by the ferocity of the pile-on, and he faltered at times in his defense, including when pressed on his past comments about women. He suggested female employees simply 'didn't like a joke I told.'

Bloomberg's campaign offered a tacit acknowledgement of his stumbles.

'It took him just 45 minutes in his first debate in 10 years to get his legs on the stage,' said Kevin Sheekey, Bloomberg´s campaign manager. 'He was just warming up tonight.'

Former New York mayor Michael Bloomberg took to the debate stage for the first time. From left: Michael Bloomberg, Elizabeth Warren, Bernie Sanders, Joe Biden, Pete Buttigieg, Amy Klobuchar

Bloomberg was at his best when tangling with Sanders, a candidate he views as outside the mainstream and unelectable.

'I don´t think there´s any chance of the senator beating President Trump,' Bloomberg said. 'And if he goes and is the candidate, we will have Donald Trump for another four years. And we can't stand that.'

The test ahead for Bloomberg: Can his overwhelming financial might overcome what is certain to be a parade of bad reviews and the end of talk, for now at least, that he could emerge as the strongest moderate alternative to Bernie Sanders?

What was unclear at the end of the two-hour contest was how much clarity it provided for Democratic voters still searching for the candidate they believe has the best chance to defeat Trump. And the candidates themselves appeared prepared to fight on for months.

In the debate´s final moments, all but Sanders found one thing to agree on: They are open to bringing the race for the nomination to the Democratic convention in July if no candidate emerges from the voting contests with a majority of the delegates in hand.