Democrats have been vociferous in their criticism of President Donald Trump, with some even suggesting that he should be impeached for a third time after next year's midterm elections.

However, one Democratic senator recently took aim at his own party, arguing that voters feel it has betrayed them. 

Senator "furious" that Democrats lost to Trump

According to Fox News, that case was made this past weekend by Colorado Sen. Michael Bennet during an interview with CNN host Jake Tapper.

"I don’t think nationally, the Democratic brand helps very much anywhere. If it did, we wouldn‘t have lost to Donald Trump twice," Bennet was quoted as telling Tapper on Sunday.

"I know a lot of supporters of mine and friends of mine are furious at Donald Trump. I am… Furious at people they think aren‘t standing up enough to Donald Trump. I am," he continued.

"But I’m also furious that the Democratic Party has lost twice to Trump," the three-term Colorado senator went on to declare.

Bennet says voters are "sick of a Democratic Party" that can't offer solutions

Bennet said that voters are "sick of a Democratic Party who hasn‘t been able to show how we’re going to address an economy where the middle class continues to shrink and where, over the last 20 years, we’ve actually lost ground in terms of, you know, the achievement of our kids in school," adding, "We need to address those things."

"I think it‘s very important for us to stand up against the insanity that Trump represents and the chaos that he represents, and show that there‘s something better," Bennet stated.

"But, we should understand that there were a lot of people that voted for him for a reason, and that‘s because they wanted to blow up Washington, D.C.," he stated.

"They‘re not surprised by his corruption, that‘s sort of a ratification of who he is. And we need to show people something different," the senator maintained.

Polls paint a bleak picture for Democrats

That figure represents an all-time low approval rating for the party. What's more, April marked the first time in a decade that the GOP had a higher favorability figure, which stood at 44%.

Fox News pointed out that its findings were not unique, as other surveys carried out by Pew Research and the Wall Street Journal last month painted an even bleaker picture.

Pew Research's poll found that just 38% of voters give the Democratic Party a favorable rating whereas the Journal's survey put the number at 36%.