Last month, the United States also suspended funding for the NEC, as well as issuing visa restrictions on dozens of senior officials.
Three witnesses testified on a wide range of issues, seeking intervention from the U.S. government to pressure Phnom Penh to reverse its crackdown.
The United States, European Union, and United Nations have all condemned the Cambodian government’s actions.
The protest was led by several former lawmakers from the Cambodia National Rescue Party, which was dissolved by court order in November.
The E.U. had previously announced some $8 million of funding for next year’s general election.
The EU and Japan are the biggest donors to Cambodia's election commission.
What did Americans think about the presidential elections on Election Day last year? VOA Khmer's Hong Chenda narrates.
The International Criminal Court has opened a preliminary investigation into US actions in Afghanistan.
It was a departure from the cult of personality Hun Sen has cultivated as a self-made rebel rather than an entitled member of the ruling class, observers told VOA.
Following the dissolution of Cambodia's only credible opposition party, the country's Prime Minister Hun Sen held a ceremony at Angkor Wat to pray for happiness and peace.