A topless Femen activist with a sign painted on her back raises her fist as she protests in front of the wax statue of US President-elect Donald Trump at the Wax Museum of Madrid on Tuesday. Pic/AFP

Washington: After a tumultuous campaign and transition, President-elect Donald Trump will take the oath of office on Friday as the least popular incoming president in at least four decades, but a majority of Americans nevertheless express optimism that he will be able to fulfil campaign pledges to boost the economy and deal with threats of terrorism, according to a Washington Post-ABC News poll.