One of the highest immediate political priorities for Senate Majority Leader Harry Reid (D-Nev.) and Senate Democratic political guru Charles Schumer (N.Y.) is to persuade veteran colleagues not to retire in 2014.
Democratic sources identify four senators as most likely to retire: Sens. Jay Rockefeller (D-W.Va.), Tim Johnson (D-S.D.), Frank Lautenberg (D-N.J.) and Tom Harkin (D-Iowa).
Another possible veteran retirement is Senate Armed Services Committee Chairman Carl Levin (D-Mich.), who has yet to announce his decision. But Democratic aides expect him to run again.