Sources close to the GOP congressman say he won't join race to succeed retiring Boxer.
The House minority leader called her close friend's decision a "great loss" for the country.
The California Democratic senator's exit will attract a large crowd to succeed her.
Sen. Rob Portman’s (R-Ohio) campaign announced Thursday that it ended 2014 with $5.8 million in cash on hand.
The N.C. GOP senator ends speculation based on his slow fundraising.
Rep. Mike Coffman's wife is also a potential challenger to Sen. Michael Bennet (D).
The NRSC has promoted a number of staff members.
Chris McDaniel says Scalise is criticized while others get free pass.
Senate Republicans will have to work hard to retain their majority.
Julian Hattem 12/19/14 03:15 PM EST
Vulnerable GOP Sen. Mark Kirk (Ill.) wants to hold a screening of the movie.