While county executive, Walker became a candidate, in February 2005, in the 2006 race for Wisconsin governor. He dropped out on March 24, 2006, after about 14 months of campaigning, citing fundraising difficulties. Walker threw his support to fellow Republican Mark Andrew Green, who won the Republican primary unopposed, and Walker actively campaigned for him during the general election. Green lost the general election, in November 2006, to the incumbent Democrat, Jim Doyle. Despite Green's loss, Walker's strong support for him helped increase Walker's favorability with the state GOP and positioned him as the frontrunner for the 2010 election.