Washington— An actor who played a street-brawling newsman in the movie “Anchorman: The Legend of Ron Burgundy” and a pizzeria owner in the television series “Bob’s Burgers” pleaded guilty on Monday to interfering with police officers trying to protect the U.S. Capitol from a mob’s attack. Jay Johnston, 55, of Los Angeles, faces a maximum sentence of five years in prison after pleading guilty to civil disorder, a felony.