Impersonators of former Vermont Gov. Howard Dean’s infamous scream can finally cash in on their talent, ROLL CALL reports. To celebrate (or desecrate) the Democratic Party’s official selection of Dean as the next party chairman, anyone who shows up at the Trover Shop book store on Capitol Hill this Thursday through Sunday and does the Dean Scream will get an (almost free) Howard Dean bobblehead doll. The creator of the Dean bobblehead, John Edgell, asks only that each Dean screamer make a small contribution — he suggests $5 — to the Kristen Ann Carr Fund for sarcoma cancer research. And...