Former FBI director Robert Mueller, the special counsel investigating possible ties between Donald Trump’s election campaign and Russian officials. Photograph: Harry Hamburg/AP

A longtime friend of US president Donald Trump has said Mr Trump is considering whether to fire Robert Mueller, the special counsel investigating poss(...)

Donald Trump has lost none of his ability to surprise. The constraints of office – what constraints? – mean nothing. Any more than the constitutional (...)

The timing of the decision to fire FBI director James Comey has raised alarm bells. Photograph: Kevin Lamarque/Reuters/File Photo

Why is Donald Trump’s sacking of the FBI director significant? For only the second time in the FBI’s 109-year history, an FBI director has been fired (...)

FBI director James Comey. ‘The key point is that Trump has fired the man investigating him.’ File photograph: Susan Walsh/AP

It took Richard Nixon five months to fire the man investigating him. It took Donald Trump less than four. The difference is that Nixon did little to c(...)

President Richard Nixon speaks at a rally at the Nassau Coliseum in Uniondale, New York, on October  23rd, 1972.   Photograph: Michael Evans/The New York Times

In dramatically casting aside FBI director James Comey, US president Donald Trump fired the man who may have helped make him president – and the man w(...)

Late former US president Richard Nixon with his wife Pat and daughter   Tricia, resigning  on August 9th, 1974, in the wake of the Watergate scandal. Photograph: Reuters

Just hours after a national address promising “no whitewash” of Watergate, President Richard M Nixon privately urged his new attorney general not to (...)