Florida: Rubio and Atwater lead Wasserman Schultz, Murphy. If US Sen. Marco Rubio (R) decides to seek reelection to the Senate, he’s an early and strong favorite over Democratic National Chairwoman Debbie Wasserman Schultz (D), according to the latest Mason-Dixon survey of Florida voters, reported in Sunshine State News. Rubio gets 53% to Wasserman Schultz’s 36%. Rubio also leads US Rep. Patrick Murphy (D) 50% to 38%. If Rubio runs for president and the US Senate seat is an open one, in a race between Florida’s two-term Chief Financial Office Jeff Atwater and Wasserman Schultz, Atwater leads 45% to 35%; against Murphy, Atwater is ahead 46% to 32% ……. Tennessee: Corker not a signature to Iran letter. US Sen. Bob Corker (R), chairman of the Senate Foreign Relations Committee, was one of seven Republicans who declined to sign a letter to Iran opposing the nuclear agreement it is negotiating with the US. No Democrats signed, which betrayed a weakness with the letter, Corker told Politico. The author of the letter was freshman US Sen. Tom Cotton (R-AR) ……. Virginia: Warner, Kaine don’t sign letter opposing offshore drilling. US Sen. Ed Markey (D-MA) sent a letter from 12 East Coast Democratic senators to Interior Secretary Sally Jewell opposing the department’s plan to allow offshore petroleum drilling off the coasts of Atlantic Coast states from Virginia to Georgia, citing potential pollution problems, reports The Hill. But Virginia’s two Democrats, US Sens. Mark Warner and Tim Kaine, did not sign; their state could receive substantial economic benefits from the plan …….