A Just Russia leader Sergei Mironov, who is also the upper house chairman, has repeatedly spoken of a possible merger with the Communist Party and has proposed they join forces.
"Mironov is not an opposition leader but is loyal to the party of power. Mironov has created a dummy ballot and votes for all of United Russia's proposals," Gennady Zyuganov.
He said a coalition or merger was only possible if both parties shared common ideas and objectives. "Unite, for what purpose? To support United Russia? I am totally opposed to their policies... I cannot agree that pensions should be 3,500-4,000 rubles while it costs 6,200 rubles a month to keep an inmate in prison," Zyuganov said.
President Vladimir Putin's United Russia party won a landslide victory at the December 2 parliamentary poll with 64.3% of the vote, followed by the Communists (11.57%), the Liberal-Democratic party (8.14%) and the Kremlin loyalist, A Just Russia party (7.74%)
The Communist Party said all the other parties that gained seats in the State Duma election were mere Kremlin lackeys and dismissed the results as rigged.