Lembah Pantai MP Nurul Izzah Anwar has met United States officials from the White House, State Department and Congress to lobby for her jailed father and PKR de facto leader Anwar Ibrahim.
According to AFP, Anwar's camp is hoping that international pressure will get the sodomy case which landed him in jail re-opened.
"America needs also to understand the impact of allowing such an important voice like Anwar to be silenced just because of political considerations.
“And I think if we allow this authoritarian regime to hijack the agenda, you will only see a worsening situation in terms of extremism," Nurul Izzah is quoted as saying by the international news agency.
Anwar has filed a review of the Federal Court verdict.
It was also reported last week that Nurul Izzah was in the US to get Washington to pressure Putrajaya into giving Anwar urgent medical treatment.
According to his family, the former opposition leader needs urgent surgery as pains which he felt in one shoulder in March, has spread to both shoulders.
Citing specialists who met with Anwar, Nurul Izzah said her father needs either microsurgery or shoulder replacement surgery.
She has threatened to file a malpractice complaint against a government doctor if treatment is refused.
The Health Ministry expert recommended physiotherapy and pain relief medication instead.
Anwar is currently serving a five-year jail sentence after being found guilty of sodomising his former aide Saiful Bukhari Azlan.
He was hospitalised in the Hospital Kuala Lumpur for several days in early July before transferred back to the Sungai Buloh prison.
The US has expressed concern over the government's treatment of Anwar, and in August US Secretary of State John Kerry said he had taken up the matter directly with Najib.
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