VERDICT: FALSE. Biden has sided with big business and Wall Street interests against American workers on issues such as trade.

"American workers need a fighter now more than ever and Joe Biden is that person because he has done it before and I've seen it firsthand," Solis said on the third night of the Democrat National Convention (DNC).

Biden has a long voting record on trade, one of the most consequential issues for working and middle class Americans looking for protections in the labor market.

In the 1990s, Biden voted in support of the North American Free Trade Agreement (NAFTA) which led to the elimination of five million American manufacturing jobs and helped eliminate at least 50,000 manufacturing plants in the United States.

Biden, in 1993, repeatedly claimed NAFTA would create more U.S. jobs at Chrysler's Newark, Delaware plant. In 2007, the Chrysler plant closed due to unfair competition in the Mexican market caused by NAFTA.

Then, in 2000, Biden voted to normalize trade relations with China. Of the five million American manufacturing jobs lost since the late 1990s, about 3.4 million were lost directly due to U.S. free trade with China.