KIEV, July 31 (RIA Novosti) - Ukraine's pro-Russian Party of Regions said Monday it would impeach President Viktor Yushchenko if he did not register the candidacy of party leader Viktor Yanukovych for the post of prime minister.

President Yushchenko currently faces a dilemma between confirming his "orange" revolution rival Yanukovych as prime minister or dissolving parliament, following its failure to form a government.

"The talks with [pro-presidential] Our Ukraine party are still failing, and if Viktor Yushchenko does not confirm Yanukovych's candidacy for the post of prime minister, the Party of Regions will have reason to resort to the harshest measures, and launch an impeachment [procedure]," Vyacheslav Chernovol, a spokesman for the party, said.

He added that if another parliamentary election were held, the Party of Regions would win a majority in the Supreme Rada.

"We could win 300 seats at an election, and this whole story would come to an end," Chernovol said.

President Yushchenko received the right to dissolve parliament after the assembly missed a 60-day deadline for forming a new government on Tuesday. He has until August 2 to decide how to respond to Yanukovych's nomination.