U.S. Congress approves debt limit increase after Senate drama

By Susan Cornwell and David Lawder

WASHINGTON, Feb 12 (Reuters) - The U.S. Congress approved an increase in the country's debt limit through March 2015, bowing to President Barack Obama's demands to extend federal borrowing authority without conditions, but only after a dramatic Senate vote on Wednesday.

Final action in the Senate followed an hour-long nail-biting procedural tally forced by the objections of Republican Ted Cruz, a conservative Tea Party favorite. It appeared at first there would not be enough Republicans to join the Democratic majority and advance the bill.

A decision by Senate Republican leader Mitch McConnell and Senate Republican Whip John Cornyn, who are both up for re-election this year, to vote to advance the measure appeared to kick the procedural tally over the needed 60 votes.

After a few more tense minutes of huddling on the Senate floor, several other Republicans changed their votes to follow their leadership. In the end, 12 Republicans joined Democrats in advancing the bill, on a vote of 67-31.

The measure, which then passed the Senate on a final, party-line vote of 55-43, now goes to Obama to be signed into law.

The House of Representatives, where Republicans hold a majority, passed the measure in a close vote a day earlier, after Republicans dropped the confrontational tactics they had used in similar votes over the past three years.

The advance of the measure this week has brought relief to financial markets. Investors were becoming increasingly jittery ahead of Feb. 27, the date by which the U.S. Treasury had been warning its borrowing authority would be exhausted, putting federal payments at risk.

Without an increase in the statutory debt limit, the U.S. government would soon default on some of its obligations and have to shut down some programs, a historic event that would have likely caused severe market turmoil.

Reaction in most financial markets to the drama on the Senate floor was muted, with U.S. stocks holding near the unchanged mark on the day and most U.S. Treasury debt prices remaining modestly lower for the session.

But there was visible relief in the short-term interest rate market. The rate on the one-month Treasury Bill, which had jumped in the past week on concern over a protracted showdown over raising the debt ceiling, dropped to its lowest in three weeks, ending the day at just 0.01 percent.

Obama welcomed the vote, but said Republican efforts to use the debt limit increase as leverage to achieve other policy goals had been damaging and should be abandoned. Since 2011, Republicans have linked raising the borrowing cap to spending cuts or cutbacks to the president's signature healthcare law, and the dispute at one point led to a downgrade of the pristine U.S. credit rating.