WLNI-SRICHMOND, Va. (AP) _ Virginia Democrats in the 5th Congressional District are set to pick a candidate to challenge incumbent U.S. Rep. Robert Hurt.  Democrats are hosting a convention scheduled Saturday at Fluvanna County High School in Palmyra to pick between Lawrence Gaughan and Ben Hudson.  Gaughan in an actor who said he recently had a role playing a Secret Service agent in the HBO series “VEEP.” Hudson is a middle school teacher.  The winner will face Hurt, a Republican who was first elected in 2010 and easily won re-election in 2012. He did not face a primary challenger.  The 5th District stretches through central Virginia nearly the entire length of the state.