Mr Mudavadi criticised former Tanzanian premier Edward Lowassa for endorsing Jubilee for a second term, adding that the Chadema party boss should keep off Kenyan politics.
Mr Mudavadi told a rally at Rigoma township that the Tanzanian opposition leader’s sentiments were not diplomatic.
Mr Musyoka said Jubilee officials were buying identity cards from voters in opposition strongholds.
Mr Wetang’ula said there were clear indications of a Nasa victory in August, adding that Jubilee leaders were misplaced in attacking the Judiciary.
The Bungoma senator said the appointment of Mr David Maraga as Chief Justice was on merit.
“We urge Justice Maraga to remain strong. Nasa will not allow any more attacks on the Judiciary,” he said.
He said if the President was not satisfied with any court ruling, he was free to launch an appeal instead of attacking judges.
The Senate Minority Leader also accused Mr Kenyatta of neglecting farmers in Kisii and Nyamira counties.
“If elected, we will build tea factories so that farmers enjoy the sweat of their produce,” he said.
Mr Odinga accused Jubilee of stealing public funds.
“There should be no other time that Kenyans had a change of leadership than now,” he said.
He accused the government of promoting corruption at the expense of development.
Mr Odinga added that the promise of constructing more than 10,000 kilometres of roads had not been met.
He said the reason Nasa wanted to replace the Jubilee administration was to save the country from plunder.
“We have put systems in place to safeguard our votes from theft,” he said.