This combination of undated photos shows South Dakota Sen. Tim Johnson, right, and his son, Brendan, left, who is U.S. attorney in Sioux Falls, S.D. Although Sen. Johnson, chairman of the Senate Banking Committee, has not said whether he intends to seek re-election in 2014, some Democrats are promoting the idea of his son, Brendan, seeking the nomination if the senator retires, as some believe he will. (AP Photo/File)
Read the article: Democratic activists eye Brendan Johnson Senate bid
