Who is Democratic congressman Dean Phillips – and why is he taking on Biden?

The Minnesota representative has angered some supporters by running against the president for the Democratic nomination

For people who know the Democratic Minnesota congressman Dean Phillips, his run for presidency is perplexing. For some of them, it's also disappointing, maybe even enraging. But they also think he's genuine in his quest to go up against Joe Biden in the Democratic primary, despite how it might affect his own political career and how it could damage Biden in one of the most consequential elections in recent US history.

Phillips announced his run for the presidency in New Hampshire last week, saying it was time for the next generation to lead in a pointed reference to concerns about Biden's age. He says he is a fan of Biden's and a supporter of his policies, but he is 54, while Biden is 80. Phillips, the heir to a distilling empire who also co-owned a gelato company, is injecting his own wealth into his presidential campaign - solving any problem of raising funds.