Updated

Tens of thousands of opposition demonstrators have taken to the streets of Taipei to protest the policies of Taiwan's China-friendly President Ma Ying-jeou.

Sunday's demonstration is the largest anti-government action since Ma was re-elected to his second four-year term a year ago.

Protesters called on the president to fire Prime Minister Sean Chen over the island's lackluster economic performance — growth was less than 2 percent in 2012 — and demanded that regulatory bodies stop a consortium widely seen as pro-China from purchasing a mass-circulation newspaper.

The consortium includes businessman Tsai Eng-meng, who already owns a popular cable TV news station and another mass-circulation newspaper.

Opponents of the latest media deal say it would concentrate too much power in the hands of a single individual.