Washington | Donald Trump must urgently refocus his campaign on the economy and jobs, rather than fomenting further controversy over media coverage or individuals such as his top infectious diseases expert, Anthony Fauci, according to conservative pollster Sir Lynton Crosby's CT Group.

Describing Mr Trump himself as 2020's most influential driver of voter behaviour, CT Group warns that while the President is stoking support among Republicans, he is also motivating his opponents and swing voters to remove him from office.