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What you need to know to follow the battle for Congress.
Party focuses on narrow field of competitive races, appears to be bracing for GOP wave.
There's little time left for Democrats to salvage their election chances.
Their campaign contributions go to candidates with varied views on gay-rights issues.
Dems enjoy a huge voter registration advantage in Delaware, which has only one congressional district.
Louisiana's primary will test whether scandals have weakened the incumbent senator.
The bill includes a provision to exempt large organizations like the NRA.
Harry Reid is locked in a battle for his Senate seat.
Rand Paul should just stop taking questions.
A few key elections will help determine who controls Congress.