Joe Biden, of the "middle class", seeks the way for Dems, but will he win back the voters of the working class?

Joe Biden may be playing cautiously during his presidential presidential run in 2020, but the former vice president was anything but in the run-up to mid-November.

Biden has crossed the country to campaign for Democratic candidates in the hope of being part of a so-called blue wave to sweep the mid-term elections.

A Biden aide told ABC News that he planned to focus on areas in which Democrats could seize potentially vulnerable red seats or retain key seats that they already occupied.

Since Labor Day, Biden has campaigned in Pennsylvania, Michigan, New Jersey, Rhode Island and California. He starred two rallies Friday in Kentucky and Indiana.

Darron Cummings / AP

Biden's appearances on Friday with two Democrats from the Red State could be an indicator of Biden's single call within the Democratic Party as a politician capable of winning blue-collar voters – a block that's only a matter of time. he thinks the Democrats will have to recover the White House by 2020.

"We can not, in my opinion, win the presidency if we can not start claiming those white-working-class voters who voted for us," Biden told the New York Times during an interview after his gathering in Kentucky.

In his remarks in Kentucky and several other campaign stops, Biden spoke of his understanding of the values ​​of the working class stemming from his own education and his decision not to invest in stocks, bonds or businesses to avoid Be influenced by money.

"I know, as I said, that my name is Joe. It's not a compliment, it's that I'm not sophisticated. That's what I've been controlling for 40 years. But I know what made the country what it is: ordinary people doing extraordinary things, "Biden said Friday amidst thunderous applause.

His remarks at campaign events focus on solutions for the middle class – as well as on a sharp contrast with President Trump.

"The question is not who is President Trump. America knows who it is, "Biden said in Kentucky. "The question is: who are we?"

Bryan Woolston / AP

In Bath County, which has almost 97% white and the majority of which is unlicensed, Biden has attracted a crowd of more than 2,200 while campaigning with Amy McGrath for the 6th district of Kentucky.

"I think it's going to create a little more excitement and bring more people to the polls who may not have been really careful and who may not be voting in the general election." said Jennifer Wells-Hosley of Lexington to hear McGrath and Biden speak.

Biden urged participants to have an optimistic view of the mid-term Democrats' prospects.

"I predict that the Democrats will win 40 seats in the House and I predict that there is a better chance than ours to win the Senate," Biden said in a speech in London on Wednesday.

He has approved more than 50 candidates in the House, Senate and Governor positions across the country before the elections, which he says are "bigger than politics".

What remains to be seen is how much a Biden could be effective against President Trump at the halfway mark. The two men, who had had heated discussions in the past, competed in Kentucky's 6th district – one of the most watched races in the mid-season – on a day-to-day basis.

As Biden focused on voting for McGrath in Kentucky, the crowd was already preparing for 2020, chanting "Run, Joe, Run" when McGrath congratulated him on returning to the campaign after leaving the White House.

The possibility of hearing a 2020 candidate was a motivator for some in the crowd.

"I'd be interested to see him run," said Whitney Harder of Lexington, who came in part to hear what Biden had to say about the problems. "I think he has charisma to rally people and I think Democrats need it now."

"I do not care as much about whether someone is a political outsider, because I think the experience in politics is important," continued Harder.

Biden said on Wednesday that he was not a candidate for 2020 "at this stage", but that he would make a decision on a possible race in January.