In the UK, Boris Johnson says if he becomes British Prime Minister he'll refuse to pay the EU's 39-billion pound divorce bill - unless Britain gets better exit terms.
He's launched his Tory leadership bid with a newspaper interview.
Speaking in the Sunday Times, he's also said he would scrap the backstop and would settle the Irish border issue only when Brussels is ready to agree to a future relationship.
Meanwhile rival Michael Gove's set out plans to replace VAT with a 'lower, simpler' alternative.
Please check out my campaign launch video. Time to deliver Brexit and unite our fantastic country. I hope you will support me > @BackBoris #BackBoris pic.twitter.com/iRZ8b0flRK
— Boris Johnson (@BorisJohnson) June 3, 2019