Original sentence: Opposition parties are allowed, but are weak and have little chance of gaining power due to the high popularity of Putin's United Russia party and the lack of criticism from the pro-Kremlin Russian mainstream media
Edited sentence: Opposition parties are allowed, but are seen as ineffective and widely considered to have no real chance of gaining power, which is partly due to the control of mainstream media and some opposition figures by the government.Russia is a one party dominant state with United Russia in power