U.S. President Donald Trump arrived in Ankara on Tuesday for a summit with NATO leaders. The U.S. president announced that Washington would lift U.S. sanctions on Turkey that were imposed in 2020 over Ankara's purchase of the Russian S-400 air defense system, while expressing a willingness to sell the fellow NATO ally F-35 fighter jets.

Reform UK leader Nigel Farage said on Tuesday he would quit as a member of the UK Parliament to trigger a by-election in his parliamentary seat, which he says he will stand in.

Farage is under investigation by the standards watchdog over whether he should have declared a 5 million pound ($6.7 million) donation from a cryptocurrency billionaire he received ​before entering parliament.

His spokesperson said, "No parliamentary rules have been broken." Farage's Reform UK party has led in almost every opinion poll in the UK for more than a year.