GOP candidate Vivek Ramaswamy talks need for fresh leadership, Iowa caucuses

Three days before the Iowa caucuses, most polls are showing GOP presidential candidate and political newcomer Vivek Ramaswamy in single digits, despite the extraordinary effort he made to visit each of the state's 99 counties twice, a feat known as the "Double Full Grassley."

Former President Donald Trump currently holds a double-digit lead in the state, and trailing him are former UN Ambassador Nikki Haley, Florida Gov. Ron DeSantis and Ramaswamy, though many voters CBS News has spoken with see the Ohio entrepreneur as their second choice to Trump.

Ramaswamy believes "the polls are drastically off," he told "CBS Mornings" co-host Tony Dokoupil.