"Centrist" Democrats

From the Washington Post today is this.

Some of the Democrats who opposed Rice were centrists from states in which President Bush won or ran strongly in November, including Evan Bayh (D-Ind.), Robert C. Byrd (D-W.Va.), Mark Dayton (D-Minn.), Carl M. Levin (D-Mich.) and Tom Harkin (D-Iowa).

With the exception of Bayh, are any these Senators really "centrists"?