Here’s what you may have missed “At the Races” on Monday …

• Former Democratic Rep. Stephanie Herseth Sandlin announced on her Facebook page that she will not seek the open Senate seat in South Dakota.
• A GOP poll found that former Alaska Gov. Sarah Palin has a slight lead over likely Republican Senate candidates Joe Miller and Lt. Gov. Mead Treadwell. Palin, however, has not indicated that she will run for the seat.
• A crowded GOP primary in West Virginia’s 2
  nd
   District may be likely. The seat is being vacated by Republican Rep. Shelley Moore Capito, who announced last year that she’s running for the state’s open Senate seat following Sen. Jay Rockefeller’s retirement.
• David Schwarz, a former staffer for Republican Rep. Jack Kingston, is running for his former boss’ seat in Georgia’s 1st District. Kingston left the seat open when he announced he was running for the Peach State’s open Senate seat.

What we’re mulling on Monday …

• Two new polls out in New Hampshire found Sen. Jeanne Shaheen, D-N.H., has a double-digit lead in a hypothetical match-up with former Sen. Scott Brown, R-Mass.
• North Carolina state Sen. Malcolm Graham became the first candidate to announce he will run for Rep. Mel Watt’s seat. Watt was nominated by President Barack Obama to lead the Federal Housing Finance Agency, although he has yet to be confirmed and has yet to resign his seat. If confirmed, Watt’s House departure would likely create a crowded special election.