• Charlie Pierce of Esquire’s Politics Blog calls in at 10:30am ET / 7:30am PT to talk about the government shutdown

• Rep. John Yarmuth (D-KY) calls in to talk about the GOP shutting down the government over the implementation of ObamaCare

• Parts of the federal government officially shut down at 12:01 Tuesday morning after Congress played hot potato with a spending bill for several hours but failed to come to an agreement to fully fund normal operations.

• In a message broadcast over Armed Forces Television at midnight Eastern Time, President Obama said he was signing emergency legislation ensuring that service members would still be paid and promised that “we’ll continue working to address any impact this shutdown has on you and your families.”

• With the government shut down, national parks expected to close, homebuyers will probably facing delays on government-backed mortgages, and an estimated 800,000 federal workers are facing furlough. Federal agencies have stopped paying for veterans’ medical care, halted disease surveillance, and have shelved toxic cleanups.

• More than three years after the Affordable Care Act was signed into law, one of the most critical elements of the health care law goes into effect today when open enrollment begins on 51 different state-based, online insurance marketplaces.