I thought I remembered that was named for Alexander Hague-Having been listening and watching various interviews with UK Foreign Secretary William Hague, one thing has occurred to me. Now this is a stretch really, but could JMS have based Robert Foxworth's William Hague on the aforementioned? He was in Prime Minister Major's cabinet in 1995, and also was a leader in making since the late 80's. Having recently watched Season 2, the two seem to share some mannerisms I think.
http://en.wikipedia.org/wiki/Alexander_Haig
-Secretary of State for Reagan. When Reagan was shot, Hague infamously stated the he, Hague, was in charge now. Even though the Vice President would be Constitutionally the one in charge.