Longtime Democratic-Farmer-Labor Party Chair Ken Martin has been elected chair of the Democratic National Committee in a commanding first ballot victory, vaulting him to the national stage while leaving a major hole to fill for local Democrats.

For two months as he campaigned for Democratic National Committee chair, Ken Martin worked methodically through a call sheet of the committee’s 448 members, sometimes on the phone for as long as an hour,

Here are five things to know about Ken Martin, the Minnesota party chair that Democrats just chose to lead the DNC.