WASHINGTON: Congress has revived the federal Export-Import Bank five months after allowing it to expire, handing a victory to business groups and a defeat to tea party conservatives and the billionaire Republican donor Koch Brothers.

A measure extending the bank through 2019 was included in a massive transportation bill that cleared the House and Senate on Thursday and is expected to be signed by President Barack Obama. The small federal agency makes and guarantees loans to help foreign customers buy US exports. Business groups like the US Chamber of Commerce say it's necessary for US competitiveness, since most overseas competitors rely on similar government help.

"We applaud the determined work of those congressional leaders who have acted to protect the competitiveness of American companies," said US Chamber President Thomas J. Donohue. The bank says that last year it authorised $20 billion worth of transactions which supported $27.5 billion of US exports and 164,000 US jobs.

But conservatives decry the bank as corporate welfare and government interference in the free market. Pushed by the Koch Brothers, leading Republican presidential candidates arrayed against it and congressional Republicans who once supported the bank announced they were opposed. Amid that pressure and with tea party lawmakers on the ascent on Capitol Hill, Congress failed to act when the bank's charter was up for renewal June 30, allowing it to expire for the first time in its 81-year history.

All along, though, a majority of lawmakers in the House and Senate, including Republicans and Democrats with major manufacturers such as General Electric, Caterpillar or Boeing in their districts, supported the bank. An unusual series of maneuvers and alliances followed, including a rarely used procedure in the House to force a floor vote on the bank over the objections of top Republican leaders.

The end result was that the measure ended up on the highway bill and five months after expiring, the Ex-Im Bank is about to come back to life.

However, conservatives and the Koch Brothers say they're not done yet.

In an interview, Marc Short, president of the Koch-backed Freedom Partners, said that in four years' time when the bank is up for renewal again, opponents will prevail, thanks to efforts over the past several years to raise the issue's profile.