As the US election season opens, a team of AFP journalists is seeking a closer look at the national mood by driving from Washington to Iowa, which on February 3 holds the first contest to select presidential candidates. Donald Trump in 2016 won historic Democratic stronghold Pennsylvania by fewer than 45,000 votes, one of several wins that stunned Washington political veterans and propelled the mogul to the White House. Four years on, could he win again in 2020?