Primary threats have a tremendous potential to change Democratic lawmakers' stances, Chris Bowers writes after Rep. Allen Boyd (D-Fla.) changed his vote to support the stimulus package after a challenger threw his hat in the ring. Meanwhile, liberals were wrongly denied a primary election by local Democratic leaders who selected a candidate to replace Sen. Kirsten GillibrandKirsten Elizabeth GillibrandCastro qualifies for next Democratic primary debates The Hill's Morning Report - Trump searches for backstops amid recession worries 2020 Democrats react to NYPD firing of officer in Garner case: 'Finally' MORE (D-N.Y.) in the House, Bowers charges.