Washington (CNN) -- An upcoming U.S. visit by Afghanistan President Hamid Karzai could be called off if he continues to make troubling political statements, White House Press Secretary Robert Gibbs said Tuesday.
President Obama invited Karzai to visit Washington on May 12, but Gibbs said that subsequent "troubling and untruthful remarks" by the Afghan president have raised questions about the value of such a meeting.
The government will evaluate any further Karzai remarks to determine whether the meeting should take place, Gibbs said.
Karzai was re-elected president last year in voting that was marred by irregularities and that required a runoff.
He further aggravated Washington, his biggest backer, on Sunday when he told a gathering of tribal leaders that the U.S.-led alliance will not move against Taliban fighters in Kandahar "until you say we can."
"I can't speak to why he said those things," Gibbs said. "They're troubling. They are confusing. They've been investigated and found to be untruthful."