The Constitution grants Congress the power to borrow money on the credit of the United States-one part of its power of the purse-and thus mandates that Congress exercise control over federal debt. Control of debt policy has at times provided Congress with a means of raising concerns regarding fiscal policies. Debates over federal fiscal policy have been especially animated in recent years. The accumulation of federal debt accelerated in the wake of the 2007-2008 financial crisis and subsequent recession. Rising debt levels, along with continued differences in views of fiscal policy, led to a series of contentious debt limit episodes in recent years. In 2011, federal debt had reached its legal limit on May 16, prompting then Treasury Secretary Timothy Geithner to declare a debt issuance suspension period, allowing certain extraordinary measures to extend Treasury's borrowing capacity. That debt limit episode was resolved on August 2, 2011, when President Obama signed the Budget Control Act of 2011 (BCA; S. 365; P.L. 112-25). The BCA included provisions aimed at deficit reduction and allowing the debt limit to rise in three stages, the latter two subject to congressional disapproval. Once the BCA was enacted, a presidential certification triggered a $400 billion increase, raising the debt limit to $14,694 billion, and a second $500 billion increase on September 22, 2011, as a disapproval measure (H.J.Res. 77) only passed the House. A January 12, 2012, presidential certification triggered a third, $1,200 billion increase on January 28, 2012, although the House passed a disapproval measure. Federal debt again reached its limit on December 31, 2012, and extraordinary measures were then used to allow payment of government obligations until February 4, 2013, when H.R. 325, which suspended the debt limit until May 19, 2013, was signed into law (P.L. 113-3). As of May 19, the debt limit was set at $16,699 billion and extraordinary measures were again employed. On September 25, Treasury Secretary Lew notified Congress that the government would exhaust its borrowing capacity around October 17. On October 16, 2013, Congress passed and the President signed a continuing resolution (H.R. 2775; P.L. 113-46) that included a suspension of the debt limit that ended on February 7, 2014. Secretary Lew declared a debt issuance suspension period on February 10, 2014, scheduled to last until February 27, 2014. After that date, according to Lew, the U.S. Treasury could have exhausted its borrowing capacity. On February 11, 2014, the House voted to suspend the debt limit (S. 540; P.L. 113-83) through March 15, 2015. The Senate approved the measure the following day and the President signed it on February 15, 2014. Once the debt limit suspension expires on March 16, 2015, the Treasury Secretary can employ extraordinary measures to meet federal obligations. Some expect those measures would not be exhausted until late summer or the fall of 2015. Treasury cash flow forecasts are subject to significant uncertainties.