From the article:
Ed Koch Still Pulls No Punches: New Book Includes Surprising Revelation About James Baker -
In the meantime, Baker is not the only Koch nemesis who could end up in a position to influence U.S. policy toward Israel. Also in the running, it appears, is Zbigniew Brzezinski, who served as President Jimmy Carter’s national security adviser. Years before Baker’s hostile remark about American Jews, Brzezinski, then an adviser to candidate Carter, was reported (by Marvin Kalb) to have said to an Israeli official, “How will you like the idea of working with a new president who owes nothing to the Jews?”
In March 1980, Koch caused a major controversy when he criticized Brzezinski and three other top Carter Mideast advisers as a “Gang of Four” who were trying to turn the U.S. against Israel. (The reference was to a group of Chinese leaders who had been pushed out of power by their rivals.)
During his years in the Carter administration, Brzezinski did indeed push for a tilt against Israel, as he acknowledged later in his memoirs of that period. More recently, he and several colleagues issued a statement urging the U.S. and its allies to engage in “a genuine dialogue” with Hamas. Brzezinski has endorsed Senator Barack Obama for president and reportedly is part of Obama’s circle of foreign policy advisers.
James Baker was a Democrat for the majority of his life.
Guess he really never left it.