I've had to open the Oval Office doors more frequently for a bad performance on television than for somebody whose temper flared enough to cause for such summons, since the doors to the Oval Office, and the term itself, debuted February 22 at Rockingham, NC. (And Francis Ferko should . . . I can't say it. He homewrecked two cities and a whole state to please himself.) But now the Oval Office doors are opening wide again for a looney show on the WB called "Superstar USA". "Auditions for The WB's Superstar USA were held in Las Vegas, Minneapolis, Orlando...