As the Democratic candidate for the U.

S Senate in South Carolina, Harrison amassed a stunning $109 million war chest for his 2020 campaign before ultimately losing his bid to unseat Republican Senator Lindsey Graham.

Harrison is the former South Carolina Democratic Party chairman, and he formerly worked for South Carolina representative James Clyburn, whose early backing of Biden helped him secure the party's presidential nomination last year.

In November's election, Democrats managed to hold their majority in the U.

S House of Representatives and one a razor thin majority in the U.

S Senate after winning to run off votes last week in Georgia.

But they are bracing for tough midterm elections in 2022 which Harrison would be charged with leading Democrats through as chairman.