U.S. presidential candidate from Democrats, former U.S. Secretary of State Hillary Clinton cancelled a trip to California within the election campaign due to pneumonia, Reuters reported.

According to the Clinton campaign, a trip to California was to be held on September 12 and 13.

Earlier it was reported that the personal doctor of the candidate Clinton diagnosed pneumonia before a ceremony in memory of the victims of 9/11 terrorist attack which she unexpectedly left because of sickness.