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Kyl becomes latest senator to retire

Move over Kay Bailey Hutchison, Kent Conrad, Joe Lieberman, and Jim Webb. The latest U.S. senator to announce that he/she won't run for re-election in 2012: Arizona Sen. Jon Kyl (R).

NBC News has confirmed through sources that Kyl, the No. 2 in the GOP Senate leadership, will announce his retirement at a press conference today from Phoenix.

The Arizona Republic adds:

Kyl was first elected to the Senate in 1994. Early in his Senate career, Kyl generally was overshadowed by the better known and more senior Sen. John McCain, his GOP colleague from Arizona who was emerging as a major national figure. But as Senate minority whip, Kyl is the No. 2 Republican senator and one of the highest-ranking Arizonans to ever serve on Capitol Hill.