How a probe of Trump-Russia ties turned into a GOP rally cry

President Donald Trump pumps his fist as he walks off after speaking at a campaign rally at Orlando Sanford International Airport, Monday, Oct. 12, 2020, in Sanford, Fla. (AP Photo/Evan Vucci)

President Donald Trump speaks during a campaign rally at Orlando Sanford International Airport, Monday, Oct. 12, 2020, in Sanford, Fla. (AP Photo/Evan Vucci)