phnom penh senator cambodia main opposition party pardon wednesday seven-year jail sentence give facebook post conciliatory sign prime minister hun sen towards opponents crackdown cambodia national rescue party cnrp lead arrest party leader kem sokha treason charge government push dissolve completely bring protest western donors senator hong sok hour 59 sentence last year fake official document post facebook say cambodia vietnam decide dissolve border sensitive subject cambodia hun sen opponents long accuse vietnamese puppet since put post 1985 vietnam occupy cambodia oust genocidal khmer rouge hong sok hour pardon king norodom sihamoni hun sen request write letter apology samdech decho ask write king issue pardon phay siphan tell reuters use hun sen official title admit fault hun sen critics accuse try turn country one-party state rule cambodian people party cpp ensure win general election next year without effective challenge opposition welcome pardon positive sign time royal pardon political situation calm say mu sochua deputy kem sokha flee exile fear arrest however hun sen reiterate wednesday cnrp would dissolve elect officials defect opposition party would allow keep position cambodian opposition member pardon pm 's request