Answering a question from ABC News' George Stephanopoulos on “Good Morning America” about whether Trump accepted FBI Director James Comey's reported denial of his claims, Sanders replied, "You know, I don’t think he does, George."
Comey expressed concerns that the president's tweets created the impression that the FBI acted improperly, and he wanted to set the record straight, the sources said.
"The administration was wiretapping American citizens," Sanders said. "His administration could have done this."
"A cardinal rule of the Obama administration was that no White House official ever interfered with any independent investigation led by the Department of Justice," Obama spokesman Kevin Lewis said in a statement Saturday. "As part of that practice, neither President Obama nor any White House official ever ordered surveillance on any U.S. citizen. Any suggestion otherwise is simply false."
Trump spokeswoman Sanders said the president wants Congress to investigate his claims.
"The president wants the truth to come out to the American people through the house intelligence committee and that is the process we go through," she said.
Rep. Devin Nunes of California, the Republican who serves as chairman of the House Intelligence Committee, said in a statement this weekend that the committee "will make inquiries into whether the government was conducting surveillance activities on any political party's campaign officials or surrogates."