Obama actually promised he would do so voluntarily prior to the bill being passed, obviously nobody believes him.

Via Health Watch:

Republican amendments to the Senate’s budget proposal would require President Obama and Vice President Biden to get their medical care through the new exchanges created by Obama’s signature healthcare law.

Sens. Susan Collins (R-Maine) and Kelly Ayotte (R-N.H.) both offered amendments to move the president and vice president into the healthcare law’s exchanges.

After the Affordable Care Act passed, the White House said Obama would enroll in an exchange once the time came in 2014. Collins and Ayotte’s amendments would require the president, the vice president and the Cabinet to put their premiums where their politics are.

Lawmakers and most of their staff members already have to purchase coverage through an exchange, thanks to a provision Sen. Charles Grassley (R-Iowa) added to the healthcare law.

But the White House and its staff aren’t covered by that provision. Some congressional leadership staffers also aren’t affected, and can remain in the healthcare exchange for federal employees.

All of the budget amendments are messaging documents — as is the budget itself. And there are a slew of proposals to repeal all or part of the Affordable Care Act.