Joe Biden's 2020 slogan is straight-up gibberish

2020 Democratic U.S. presidential candidate and former Vice President Joe Biden talks to reporters after ordering an ice cream cone at the Cone Shoppe during a two-day campaign kickoff in Monticello, Iowa, U.S. April 30, 2019.

"Trump's already anxious about Joe Biden", Colbert said.

Trump began a spate of Twitter activity shortly before 6 a.m. with a tweet of his own deriding the International Association of Fire Fighters as a "dues sucking union".

"I'll never get the support of Dues Crazy union leadership, those people who rip-off their membership with ridiculously high dues, medical and other expenses while being paid a fortune", Trump said in an earlier tweet.

Trump was responding to news that the largest firefighters union in America had formally endorsed Biden for 2020.

"Joe Biden is going to make us moral again?" Last week, Trump mocked Biden by calling him "sleepy Joe". The former vice president said he believed there was "without any question" Russian Federation meddling during the 2016 election and that Congress should act swiftly to assess whether or not Trump obstructed justice by trying to block the inquiry.

Most of the replies reassured the president that firefighters support him over Biden.

Biden has highlighted his longstanding support for trade unions and his appeal to blue-collar workers across the country.

In interviews after Monday's endorsement announcement, General President Harold Schaitberger explained polling the union did of some of its members.

The number of undecided New Hampshire voters who did not pick a Democrat they thought could beat Trump stands at 31.47 percent.

After Trump slammed union leaders last Friday, Biden hit back.

On Monday, Trump sent a series of critical tweets about the former vice president.

Pennsylvania is a key battleground state where white, working-class defections from the Democratic Party helped Trump win in 2016.

Numerous users Trump retweeted purported to be firefighters responding to a tweet from a conservative radio show host who supported the president or criticized the union's endorsement of Biden, though it's unclear if each response came from legitimate accounts and not Twitter bots, which are known to interact in political discourse. Minimum wage, overtime pay, the 40-hour week: they exist for all of us because unions fought for those rights.

He added, "We need a president who honors them and their work".

Biden, who represented DE in the Senate for more than 30 years, also collected endorsements from the state's entire congressional delegation: Sens.