Most of the congress delegates from the U.S. Republican Party voted for Donald Trump's nomination as a presidential candidate, Reuters reported.

Donald Trump who is officially approved as the U.S. presidential candidate is the only one from the Republicans. All his rivals have left the pre-election race even during primaries.

At the congress which began on July 18 and will last for four days  Trump's opponents from the Republicans were trying to achieve change of rules of vote not to allow him be a candidate. However, the national committee of Republicans  ignored this protest.

Trump chose Indiana Governor Mike Pence as a candidate for vice-president  on July 15. According to Reuters, Pence's candidacy caused a positive reaction in the energy sector of the U.S and discontent among environmentalists. Both sides noted that the politician is a defender of the national coal-mining industry  and the opponent of plans of the American president Obama for fight against climate change.