The Secret Service on Tuesday arrested a Washington state man accused of making an email threat against President Obama and brandishing a shotgun at officers who came to his door. Anton Caluori, 31, was arrested at an apartment in this south Seattle suburb for investigation of making threats against the president and assault on a federal officer, said Brian Leary, a Secret Service spokesman in Washington, D.C. Caluori is scheduled to appear at 2 p.m. Wednesday in federal court, Leary said.