The United Kingdom will exit the European Union after the "leave" referendum passed by a vote of 52%-48%. Prime Minister David Cameron saw the vote as a rejection of his leadership and resigned.

Thank you everyone who voted to keep Britain stronger, safer & better off in Europe - and thousands of @StrongerIn campaigners around the UK

-- David Cameron (@David_Cameron) June 23, 2016

Donald Trump, the presumptive Republican presidential nominee in the United States, happened to arrive in Scotland to visit one of his golf courses as the results were becoming known. He apparently sees a parallel between the 'leave' sentiment in the UK and his campaign.

Just arrived in Scotland. Place is going wild over the vote. They took their country back, just like we will take America back. No games!

-- Donald J. Trump (@realDonaldTrump) June 24, 2016

Trump ignored that Scotland overwhelming voted to STAY in the EU and that the referendum has renewed consideration of another indepdendence referendum to leave the UK so Scotland could remain in the EU>

Self-determination is the sacred right of all free people's, and the people of the UK have exercised that right for all the world to see.

-- Donald J. Trump (@realDonaldTrump) June 24, 2016

Scotland rejected an independence referendum barely two years ago under the assumption that the UK would remain in the EU.

Genuinely, do Scotland get another referendum now? Surely Scottish people's votes were cast based on the situation as it was?

-- Aisling Bea (@WeeMissBea) June 24, 2016

The results sent the British pound into a tailspin -- falling 11% in the early morning hours as the result appeared certain. The news sent U.S. stocks plunging w hen trading began in New York Friday morning.

Nasdaq down 3.6 percent shortly after opening following Brexit vote, Dow Jones down 530 points

-- Reuters Top News (@Reuters) June 24, 2016

It was a surprise to most observers, considering polls suggesting the "remain" side had an edge. A low turnout of younger citizens is getting some of the blame for the failure of the remain camp.

It's a "crushing" decision, it will be "catastrophic," @Keith4Leicester says https://t.co/K6pbNn362q #EUref #Brexit https://t.co/ANoOzEEqyK

-- BBC Breaking News (@BBCBreaking) June 24, 2016

The decision brings with it uncertainty since no country has ever left the E.U. and British leaders had not seriously entertained the idea it would come to pass.