Judas Jeffords and Lincoln Chaffee were never centerists. They might properly be described as turds in the punch bowl. Too much sugar might be unhealthy, but it adds flavor. Lime slices might be healthy, but they are mainly for decoration rather than part of the punch. Floating turds add neither flavor nor decoration.
Chaffee and Jeffords were "moderates" like Lowell Weicker was a moderate. Guys with ACU ratings like theirs are not moderate.
Chaffee had an approval rating of 63? Either that number was bogus or too many of those 63% of Rhode Islanders didnt show up to vote I guess.