Biden responded to Trump's attack tweeting \"I'm sick of this President badmouthing unions. Labor built the middle class in this country. 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.\"

I'm sick of this President badmouthing unions. Labor built the middle class in this country. Minimum wage, overtime pay, the 40-hour week: they exist for all of us because unions fought for those rights. We need a President who honors them and their work.

— Joe Biden (@JoeBiden) April 29, 2019
\"PHOTO:
Kevin Lamarque/Reuters
PHOTO: Supporters hold up signs as former Vice President Joe Biden finishes his speech to the International Association of Fire Fighters in Washington D.C., March 12, 2019.
>

For Trump, unions are a critical voting constituency that helped him win critical swing states such as Michigan and Ohio and Pennsylvania in 2016. Biden announced his plans to run for president, is a familiar face among labor groups having protested with labor organizations for decades.

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