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LONDON, ENGLAND - JUNE 13: DUP leader Arlene Foster and MP Nigel Dodds arrive at 10 Downing Street on June 13, 2017 in London, England. Discussions between the DUP and the Conservative party are continuing in the wake of the UK general election as Prime Minister Theresa May looks to form a government with the help of the Democratic Unionist party's ten Westminster seats. (Photo by Jack Taylor/Getty Images)

LONDON, ENGLAND - JUNE 13:  DUP leader Arlene Foster and MP Nigel Dodds arrive at 10 Downing Street on June 13, 2017 in London, England. Discussions between the DUP and the Conservative party are continuing in the wake of the UK general election as Prime Minister Theresa May looks to form a government with the help of the Democratic Unionist party's ten Westminster seats.  (Photo by Jack Taylor/Getty Images)

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LONDON, UNITED KINGDOM - JUNE 13: British Prime Minister Theresa May leaves after meeting Democratic Unionist Party (DUP) leader Arlene Foster (not seen) at 10 Downing Street in London, United Kingdom on June 13, 2017. (Photo by Kate Green/Anadolu Agency/Getty Images)

LONDON, UNITED KINGDOM - JUNE 13: British Prime Minister Theresa May leaves after meeting Democratic Unionist Party (DUP) leader Arlene Foster (not seen) at 10 Downing Street in London, United Kingdom on June 13, 2017. (Photo by Kate Green/Anadolu Agency/Getty Images)

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Secretary of State for Foreign and Commonwealth Affairs Boris Johnson departs Downing Street on June 13, 2017 in London, United Kingdom. The Prime Minister has re-shuffled her cabinet after the snap general election which failed to return a clear overall majority winner. Theresa May is set to meet Northern Ireland's Democratic Unionist Party leader Arlene Foster later today in hope of making an agreement to form a minority Government. (Photo by Alberto Pezzali/NurPhoto via Getty Images)

Secretary of State for Foreign and Commonwealth Affairs Boris Johnson departs Downing Street on June 13, 2017 in London, United Kingdom. The Prime Minister has re-shuffled her cabinet after the snap general election which failed to return a clear overall majority winner. Theresa May is set to meet Northern Ireland's Democratic Unionist Party leader Arlene Foster later today in hope of making an agreement to form a minority Government. (Photo by Alberto Pezzali/NurPhoto via Getty Images)

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BELFAST, NORTHERN IRELAND - JUNE 09: DUP leader and Northern Ireland former First Minister Arlene Foster (C) holds a brief press conference with the DUP's newly elected Westminster candidates who stood in the general election on June 9, 2017 in Belfast, Northern Ireland. After a snap election was called by Prime Minister Theresa May the United Kingdom went to the polls yesterday. The closely fought election has failed to return a clear overall majority winner and a hung parliament has been declared. Arlene Foster and the Democratic Unionist party with their ten Westminster seats have today stated that they will back Theresa May and the Conservatives in a prop up goverment. The two parties will continue talks about the finer details of the arrangement. (Photo by Charles McQuillan/Getty Images)

BELFAST, NORTHERN IRELAND - JUNE 09: DUP leader and Northern Ireland former First Minister Arlene Foster (C) holds a brief press conference with the DUP's newly elected Westminster candidates who stood in the general election on June 9, 2017 in Belfast, Northern Ireland. After a snap election was called by Prime Minister Theresa May the United Kingdom went to the polls yesterday. The closely fought election has failed to return a clear overall majority winner and a hung parliament has been declared. Arlene Foster and the Democratic Unionist party with their ten Westminster seats have today stated that they will back Theresa May and the Conservatives in a prop up goverment. The two parties will continue talks about the finer details of the arrangement. (Photo by Charles McQuillan/Getty Images)

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DUP leader Arlene Foster and deputy leader Nigel Dodds cheer as Emma Little Pengelly is elected to the South Belfast constituency at the Titanic exhibition centre in Belfast where counting is taking place in the 2017 General Election. (Photo by Niall Carson/PA Images via Getty Images)

DUP leader Arlene Foster and deputy leader Nigel Dodds cheer as Emma Little Pengelly is elected to the South Belfast constituency at the Titanic exhibition centre in Belfast where counting is taking place in the 2017 General Election. (Photo by Niall Carson/PA Images via Getty Images)