As election day nears, fears rise and security tightens in a divided Arizona that has become key battleground

Phoenix, Arizona: Arizona is ground zero as the countdown to the US general elections nears the day of reckoning with two former US presidents and current President Joe Biden set to visit the state. Security measures are being heightened to an unprecedented level, according to experts.

A 12 News report spoke to security experts who are predicting this year to be the most intense they have ever seen.

On Tuesday, police were called to US Senate candidate Kari Lake's campaign office after an unknown substance was found in an envelope. Although it was ultimately deemed non-hazardous, the scare prompted heightened security.

On Tuesday night a man was arrested for hanging suspicious bags of white powder to political signs in Ahwatukee and is also connected to the shootings at a Tempe DNC office.

Sean Kinsey, founder and CEO of Kinsey Security Group, who has worked security for Arizona governors Doug Ducey and Jan Brewer, told 12 News: "You can expect a much larger security footprint. Their mission is to keep dignitaries and attendees safe, while avoiding complacency."

Local law enforcement agencies are also ramping up efforts. Jeff Hines, a retired Phoenix Police commander, told 12 News that these heightened measures have been in place since an assassination attempt on former President Donald Trump in July. "Since then, security has seriously ramped up," said Hines. This includes the use of facial recognition technology, drones, helicopters, and planes to monitor the events.

Those attending political events in Arizona can expect thorough security checks, similar to those seen at major sporting events. "You're going to be searched, have your bags checked, and won’t be able to bring certain items inside," said Hines.