Labor Party leader Amram Mitzna announced today that he would not join a national unity government headed by the Likud. Prime Minister Ariel Sharon has consistently promised to form such a government after the elections, saying he would turn to Labor and invite it to join. Mitzna, an ultra-leftist who has less in common with Sharon than do several of his Labor Party colleagues, said that all governments led by Likud have been failures. He said that he did not know where Sharon got the idea that a Likud-Labor unity government was a realistic option. Mitzna did not rule out a unity-government with the Likud led by Labor, however.