triangulator
n.— «Your husband, President Clinton, who is arguably the most effective Democratic politician in a generation, was often referred to as a “triangulator,” a practitioner of what was termed the third way of politics. Recently Noam Schrieber, senior editor at The New Republic, argued in an op-ed that this kind of politics, particularly as followed by the Democratic Leadership Council, has become in essence an anachronism.» —“Blogging the Presidentials, McJoan’s Story” by Joan McCarter Yearly Kos Convention Aug. 8, 2007. (source: Double-Tongued Dictionary)