Kari Lake's office on lockdown after campaign staffer opened envelope with ‘suspicious’ substance inside

The office of Arizona GOP Senate candidate Kari Lake was put on lockdown Tuesday after a campaign staffer opened a package with a “suspicious” substance. A campaign spokesperson told Fox News Digital that an intern at the campaign’s Phoenix office opened an envelope with a suspicious substance and a note that said, “caution anthrax.”  The office of Kari Lake in Phoenix, Arizona.  (Kari Lake campaign provided)CONTENTIOUS EXCHANGES OVER ILLEGAL IMMIGRATION FRONT AND CENTER IN ARIZONA SENATE DEBATEThe campaign called authorities, prompting a response from multiple law enforcement agencies and a hazmat team.  Authorities are testing the suspicious substance.  (Kari Lake campaign provided)Authorities have not confirmed if the substance was anthrax. The campaign spokesperson said the substance is now being tested.  Authorities on scene after an envelope with a “suspicious” substance was found at the office of Kari Lake.  (Kari Lake campaign provided) A hazmat team arrives on…