He does have experience getting socialists elected.
Via Reason:
The British Labour Party has appointed David Axelrod as a strategic adviser to Ed Miliband’s 2015 campaign. Axelrod, who went on to serve as a senior adviser to President Obama after acting as an adviser on the president’s 2008 campaign, will reportedly be paid a six-figure sum for his work.
Miliband, the leader of Labour, will be prime minister if his party wins a majority in the next election. According to recent polling, 35 percent of British voters back Labour, compared to 33 percent who support the Conservatives, whose leader, David Cameron, is the current prime minister.
“Red Ed” Miliband is not shy about cheerleading for socialism or calling himself a socialist. According to Miliband, “Being a socialist for me is about being willing to criticise capitalism—and saying capitalism produces many injustices, which politics must tackle.”