The number of worthwhile albums that memorialize politicians can probably be counted on one hand. But you can add one more to that short list with Songs for Frank Zeidler, a CD dedicated to the memory of Milwaukee's last Socialist mayor. Who better to pay tribute than a couple of Milwaukee's finer folkies? Jym Mooney recounts Zeidler's accomplishments and honesty in a breezy manner that could be the soundtrack to an elementary school biography of the man. Larry Penn, known for labor and political singing/songwriting, offers a more philosophical angle. Penn's biblical allusions and stately baritone befit the gravity he brings to his affable subject.