White House aides Monday defended President Donald Trump’s unsubstantiated claim that former President Barack Obama ordered a wiretap on telephones Trump used at his Trump Tower headquarters in New York. Spokeswoman Sarah Huckabee Sanders said the president was unwilling to accept an assertion by James Comey, the director of the country’s top law enforcement agency, the Federal Bureau of Investigation, that Obama did not order an illegal wiretap on Trump. James Clapper, Obama’s national director of intelligence, has also disputed the new president’s contention. In interviews on news talk shows, Sanders and Trump aide Kellyanne Conway both said the new president firmly believes his claim posted Saturday on Twitter, saying, “Terrible! Just found out that Obama had my ‘wires tapped’ in Trump Tower just before the victory.” Trump has offered no evidence to support the claim, but Sanders, Conway and, later, White House spokesman Sean Spicer said congressional committees need …