Senate

For President Obama and Senate Democrats, who gathered in a White House meeting Wednesday, it's all about mutual aid at this point.

If Obama is to maintain any leverage in Congress, he needs Democrats to keep control of the Senate since the House appears likely to remain in Republican hands. And if his second term agenda has any hope of being achieved — such as tackling income inequality, overhauling immigration or reaching a durable nuclear deal with Iran — he'll need a Democratic Senate majority working side-by-side with him.

Sen. Mary Landrieu of Louisiana, considered among the most vulnerable of the Senate's red-state Democrats facing 2014 re-election, now has at least one potential Republican opponent, Rep. Bill Cassidy, whose congressional district includes Baton Rouge.