(Updates throughout with detail)
By Bate Felix and Doug Palmer
BRUSSELS/WASHINGTON, March 26 (Reuters) - The United States has talked with U.S. credit cards companies about barriers they face in China and is mulling the best step for cracking open that market, the top U.S. trade official said on Friday.
"My preferred course of action is always ... direct negotiations," U.S. Trade Representative Ron Kirk told reporters when asked about the possibility of filing a World Trade Organization case on the issue.
If negotiation proves fruitless, "then we can make a decision at an appropriate time ... whether we want to file suit," Kirk said. "As of this day, we have not made a decision. I am still waiting on recommendations."
Kirk was in Brussels for talks with European Trade Commissioner Karel de Gucht after meetings in Egypt.
MasterCard Inc
Currently only China Union Pay is permitted to process domestic electronic payments in China.
China promised when it joined the WTO in 2001 to remove market access restriction and provide national treatment for for foreign credit, charge and debit card companies.
A U.S. industry official who asked not to be identified said on Friday he believed USTR had a case ready to go anytime it wanted to pull the trigger.
"The case is done. This is a longstanding issue. It was raised numerous times in the past and the Chinese have continued on their merry way," he said.
China's refusal to open its payment-processing market is "part and parcel of their broad approach to blocking foreign competition and developing national champions," he said.
China failed to meet a December 2006 deadline for opening its payment processing market, and since then the issue has been repeatedly raised at high-level talks between the United States and China.
"The United States will continue to pursue this issue vigorously in 2010, taking further appropriate actions seeking to ensure that U.S. providers of electronic payment processing and related services enjoy the full benefits of the market-opening commitments that China made," USTR said in a December 2009 report.
Next week, USTR will release its annual report on the most egregious trade barriers faced by U.S. companies.
The chairman of the U.S. House of Representatives Ways and Means Committee, Sander Levin, and other Democrats, in a letter on Friday, urged President Barack Obama to use that report to lay out a strategy for resolving long-standing trade barriers.
Obama also faces mounting pressure to get tough with China for "manipulating" or undervaluing its currency to give Chinese companies an unfair trade advantage.
Many U.S. companies have been reluctant to publicly call for WTO cases against China out of fear that could suffer retaliation from Beijing. (Additional reporting by Dan Wilchins in New York; editing by Philippa Fletcher and Leslie Adler)