DES MOINES, Iowa (AP) – Iowa Republican Congressman Steve King says he is nearing a decision on whether to seek the U.S. Senate seat held by retiring Democrat Tom Harkin, but does not know today whether he will run. Appearing on Iowa Public Television’s “Iowa Press,” the six-term U.S. House member from Kiron said: “I need to get a decision made fairly quickly.”

King says he is reviewing polling data he says will help him decide. The outspoken western Iowa conservative has been urged by Republicans, including Gov. Terry Branstad, to forgo a 2014 bid, and run in 2016, in the event six-term Republican Sen. Charles Grassley retires.

Democratic Congressman Bruce Braley of Waterloo is his party’s only candidate for Senate. Harkin, first elected in 1984, said in January he would not seek a sixth term.