Secret Service staff shortage results in outdoor Trump rally moving to indoor Wisconsin venue

Former President Donald Trump's campaign had to move a planned outdoor rally in Wisconsin to an indoor venue due to a Secret Service staffing shortage, according to a report.

The rally was scheduled to take place at an airport on Saturday, but a smaller indoor arena located in Prairie du Chien, Wisconsin has been chosen as the new site, CBS News reported.

The Secret Service reportedly attributed the staffing shortage to the security needs of foreign leaders at the ongoing United Nations General Assembly annual meeting in New York. 

The first assassination attempt on Trump occurred at an outdoor rally in Butler, Pa. in July. 

A suspect was arrested earlier this month after pointing a gun through the bushes at his golf club in Palm Beach.