LONDON — Britain's biggest-selling newspaper — the Rupert Murdoch-owned Sun — endorsed the campaign for the U.K. to leave the European Union on Monday.
Britons will vote on June 23 on whether to remain part of the EU, a choice with far-reaching consequences for politics, the economy, defense and diplomacy in Britain and elsewhere.
"This is our last chance to remove ourselves from the undemocratic Brussels machine ... and it's time to take it," The Sun declared in a front-page editorial.
It added: "The Sun urges everyone to vote Leave. We must set ourselves free from dictatorial Brussels."
The tabloid has a circulation of 1.7 million.
Related: Why Britain Could Quit the EU and Why America Cares
Recent polls are suggesting that momentum has swung towards the "Leave" camp, or a so-called Brexit, unsettling investors. "Leave" in recent days has focused its campaign on the issue of immigration.
According to the YouGov poll for The Times, "Leave" held 46 percent support compared with 39 percent support for "Remain." Undecided voters were 11 percent, while 4 percent won't vote.
Last Monday, The Times/YouGov had reported a 1 percent lead for the "Remain" campaign.
Opinion pollsters are under pressure because they failed to forecast both Prime Minister David Cameron's unexpectedly decisive election victory and the result of Israel's election last year.