Partyforumseasia: Never underestimate the determination of Prime Minister Hun Sen to defend his grip on power and ignore the opposition which may have been tempted to overestimate its leverage after its success in the 28 July elections. Especially calling support from the international community gives Hun Sen the easy counter-argument that he will never allow such interference.
Opposition leader Sam Rainsy might share the bitter experience of Anwar Ibrahim in Malaysia. They both have their nemesis in prime ministers clinging to power and defending a privileged access to the resources of their country.

The Voice of America Cambodia article (http://www.voacambodia.com/content/hun-sen-decries-foreign-interference-in-cambodian-politics/1757797.html) also quotes the PM:
“Hun Sen said in a six-hour address on Wednesday that he opposed “foreign interference” in Cambodia’s political affairs.
“We do not need the recognition of any president or ambassador,” Hun Sen said. “It’s not necessary to ask for the recognition of the UN secretary-general, or signature countries of the Paris Accords. I won’t allow any foreigners to dictate Cambodian politics.”
Partyforumseasia: See also the insightful analysis by Phoak Kung in The Diplomat (http://thediplomat.com/2013/10/14/reforming-the-cambodian-peoples-party/) also available in Bomborra  (Click on the blue names to access the article)