Kenya's opposition lined up Thursday behind a single candidate, veteran political leader Raila Odinga, in an unprecedented step to strengthen their challenge to the government in August's polls
Former prime minister Odinga, 72, was named presidential candidate by senior leaders of the National Super Alliance (NASA) at a large rally in the capital Nairobi.
Odinga will, for the second consecutive time, challenge President Uhuru Kenyatta in a repeat of a 2013 election that he lost in the first round.
However, this time five of the country's main opposition leaders have united, something they always failed to do previously.
Musalia Mudavadi, a former vice president who struck out on his own in 2013, said that this time he and others had "sacrificed personal ambitions" to present a united front to challenge Kenyatta and his dominant Jubilee Party on August 8.
Kenyatta countered by accusing the opposition of wanting to create a prime minister's job not provided for in the constitution.
They were doing this instead of "finding a job for millions of Kenyans who need one," said a statement from the presidency.
Tens of thousands of opposition supporters waited most of the day in Nairobi's downtown Uhuru Park to witness the declaration of Odinga as their presidential candidate.
In a repeat of the main opposition ticket of four years ago, Kalonzo Musyoka, another former vice president, was named Odinga's running-mate.
Other senior positions were divided among Mudavadi, Moses Wetangula and Issac Ruto.
The five men stood together on stage in matching white shirts and hats, dancing in loose coordination to celebrate the announcement.
"All NASA partners are equal, and one plays the role of the first among equals," Mudavadi told the cheering crowd.
Musyoka insisted the alliance would hold. "We will work with Raila to move this country forward as a team, that is why we have remained together this far," he said.
"This is a great honour and I accept it," said Odinga who will be making his fourth attempt to become Kenya's president after failing in 1997, 2007 and, again, four years ago.