U.S. liberal groups, divided in their support of Democratic presidential candidates Hillary Clinton and Bernie Sanders, have urged a united, active opposition to Donald Trump, the Republican front-runner.
In an open letter released on Tuesday, a group of liberal organizations called for a "non-violent movement" to thwart Trump's candidacy for November's general election, calling the New York billionaire a "hate-peddling bigot who openly incites violence."
"This is a five-alarm fire for our democracy," said the letter, which was signed by the leaders of the liberal advocacy group MoveOn.org, a supporter of Sanders, and the Service Employees International Union, a major labor union that is backing Clinton.