Mr Verhofstadt claimed “external manipulation” was behind Brexit and Mr Trump’s election, branding the results “victories for our enemies”. The extraordinary outburst comes as European Council president Donald Tusk said the EU could give Theresa May an extension on Article 50 until June 30. But the extension on Britain’s March 29 EU leaving date is conditional on MPs voting for Mrs May’s Brexit deal next week.
Mr Verhofstadt tweeted: “Both Trump & Brexit involved external manipulation. Both were victories for our enemies.
“Both have torn apart communities instead of bringing them together. Both mean building walls instead of breaking them down. There is another way.”
Mr Verhofstadt, the European Parliament’s Brexit coordinator, was speaking ahead of May’s European elections.
The eurocrat heads the pro-EU Alliance of Liberals and Democrats for Europe (ALDE) group in the European Parliament.
His anti-Brexit and anti-Trump broadside was fired as Mrs May battles to win over MPs to her Withdrawal Agreement.
In Wednesday’s PMQs, Mrs May hinted she may resign when she warned “I cannot support an extension beyond June 30”.
Labour leader Jeremy Corbyn accused Mrs May of causing “crisis, chaos and division” since the 2016 referendum.
Speaking after PMQs, Mr Tusk said he believed all 27 other EU states would agree to a Brexit delay to June 30, but it depended on a “positive” vote in the Commons next week.
In January, Theresa May lost the first vote on her Withdrawal Agreement by 230 votes, the biggest ever Parliamentary defeat for a government.
The second vote saw the deal defeated by 149 last week.
Britain’s Brexit chaos deepened last week when Commons Speaker John Bercow ruled out a third vote on Mrs May’s deal.
But Brexit Secretary Stephen Barclay said MPs could “find a way” to vote again if enough MPs changed their minds.