Only 48 per cent of Americans have a favourable view of Pope Francis, down from two thirds a year and a half ago, according to polling by CNN.
The most recent poll was conducted between September 6 and September 9 amid controversy over allegations raised against Pope Francis by his former US nuncio, Archbishop Carol Maria Vigano.
Among US Catholics, the Pope's favourability rating fell from 83 per cent in January 2017 to 63 per cent now.
The survey results are all the more surprising because a poll by Pew Research Forum conducted in January found that Pope Francis was still highly regarded among Americans, with roughly six in ten expressing a favourable view of him. His popularity was particularly high among Catholics, with 84 per cent expressing a favourable view.