Oregon Senators Ron Wyden and Jeff Merkley called on Congress to take action to stop gun violence, in remarks on the steps of the U.S. Capitol Thursday.  They spoke one week after the shooting at Umpqua Community College in Roseburg that claimed nine lives and injured nine others.  Wyden called the roll call of shootings in the U.S. far too long, and Congress needs to better to prevent more tragedies.  Wyden and Merkley are calling for closure of background check loopholes, improvement in the background check database, and making “straw purchasing” — in which one person buys a gun for someone else who is not legally allowed to have one — and gun trafficking federal crimes to give law enforcement the tools it needs to stop the flood of illegal weapons across state lines.