According to data from OpenSecrets.Org, from 1992 to 2006, Pfizer gave 74 percent of its campaign contributions to Republicans. Since then, particularly after Hank McKinnell left as CEO, Pfizer is giving slightly more to Democrats than to Republicans. In the current cycle, 54 percent of contributions go to Democrats.
(Data from OpenSecrets.Org. Graph by KEI.)
Recent posts on pharma industry lobbying