Lt. Gov. Peggy Flanagan (D) is projected to deliver a key victory for progressives and defeat Rep. Angie Craig (D-Minn.) in the Democratic primary for retiring Sen. Tina Smith’s (D-Minn.) seat, according to Decision Desk HQ. Flanagan ran against five other Democrats for the party’s nod, though Craig was her most formidable challenger. Flanagan will now face former NFL…