MARK KIRK

A new sense of uncertainty has risen over Pennsylvania’s pivotal Senate contest.

The two situations differed, for a variety of reasons.

The Democrat suffered a stroke in May, and his recovery has become a focal point in the closing phase of the Senate race in Pennsylvania, drawing growing attention from the campaigns and others.

The Republican nominee for U.S. Senate in Pennsylvania, Dr. Mehmet Oz, has released his health records as he maneuvers to keep questions about Democratic rival John Fetterman’s recovery from a stroke front and center.

The Democrats’ fragile hold on the Senate majority has become vividly apparent with the sudden illness of of New Mexico Sen. Ben Ray Luján.

Ald. Pat Dowell is expected to announce this week her candidacy for the Democratic nomination for secretary of state, j

Illinois Senator Mark Kirk is apologizing after an open mic caught an off-color comment about Senator Lindsey Graham's luck with the ladies. CBSN's Jeff Glor has the controversy.

Sen. Mark Kirk, R-Illinois, blasts the latest developments in the Iran nuclear negotiations.