However a 1996 analysis by the nonpartisan but liberal-leaning  Center for Public Integrity found that Democratic contributors only filled a third of the available trip seats, and many of those made contributions to Republicans as well.
However, a 1996 analysis by the nonpartisan but liberal-leaning Center for Public Integrity revealed that Democratic donors occupied only one-third of the available trip seats, and many of those also made contributions to Republicans as well.