Vice President Mike Pence abruptly canceled a scheduled event in New Hampshire, and was at the White House on Tuesday.
"He looks forward to rescheduling the trip to New Hampshire very soon," Farah said.
A White House official said President Donald Trump is fine.
"This is not health related for the VP or president," a senior White House official said. "Nothing related to national security."
White House officials gave no details on why Pence canceled his trip, but said several times that there was "no cause for alarm."
Pence never left Washington on Air Force 2. However, people were already gathered in New Hampshire awaiting his arrival.
Pence was planning to make a daytrip to New Hampshire to visit the headquarters of Granite Recovery Centers, and speak about the state's opioid crisis.
New Hampshire Gov. Chris Sununu, who was expected to join the vice president at the event, was not given a reason for Pence's change of plans, according to Ben Vihstadt, a spokesman for the governor.
Sununu was "notified right around the same time as the public," Vihstadt said. "Governor Sununu is looking forward to welcoming the Vice President to New Hampshire at a later date."