Lieberman, on the other hand, was Al Gore’s running mate in 2000. He ran for the Democratic presidential nomination in 2004 and voted for Harry Reid as majority leader until leaving the Senate.

The Democrat Cruz likes better than Hagel opposed every Republican presidential candidate until McCain, including Reagan. His lifetime American Conservative Union rating was 15.79 and he scored a zero in 2005. Lieberman voted to keep partial-birth abortion legal.

Lieberman teamed with McCain and Lindsey Graham as the Senate’s hawkish “three amigos.”