Armed U. S. marshals delivered a congressional subpoena to the home of Clinton associate Sidney Blumenthal to summon him before a special panel investigating the terrorist attacks in Benghazi.

Rep. Elijah Cummings of Maryland, who is the top Democrat on the Benghazi Committee, called the decision by the GOP to send marshals to Blumenthal’s home “heavy-handed, aggressive and unnecessary,” and a political tactic to undermine the presidential candidacy of Hillary Clinton.