Republican candidate Donald Trump was briefly rushed off the stage by Secret Service agents at a rally in Reno, Nevada, in a false alarm.
A man holding a sign saying Republicans Against Trump was tackled by security agents, after shouts that he had a gun.
Mr. Trump returned to the stage at Saturday’s rally minutes later.
The Republican candidate says he is going to target states seen as Democratic strongholds ahead of Tuesday’s election.
Latest on Sunday’s campaigning
Both candidates have been making late changes to their travel schedules as falling poll numbers for Mrs Clinton in some key Democratic-leaning states present what the Trump campaign sees as new opportunities.
SOURCE: BBC News Online