Republican senator from Kentucky Rand Paul argued that holding an impeachment trial after a president is no longer in office is not constitutional.  Photograph: EPA/Jim Lo Scalzo

The prospect that Donald Trump will be convicted in his impeachment trial receded on Tuesday after 45 Republicans objected to the constitutionality of(...)

US president Donald Trump has previously described Nato as “obsolete”.  Photograph: Doug Mills/The New York Times

US president Donald Trump arrived in London on Monday night for a Nato summit, amid concerns about his country’s commitment to the defence alliance th(...)