An Electoral College member in California has filed a lawsuit as part of an attempt to block Donald Trump's installation as President.

Democrat Vinz Koller of California is the 10th Presidential elector to join the anti-Trump club, and is trying to overturn a law that will force him to cast his vote for Hillary Clinton because she won the popular vote in his state. A similar action was filed in Colorado days earlier.

The aim of the suit, Politico reports, is to undermine such rules in 29 states across the country, including in areas where Republican electors have voiced concerns about Mr Trump.

Mr Koller's lawsuit argues that the US founding fathers intended electors to have free choice in how they voted.

Melody Kramer, his lawyer, wrote: "Though Hillary Clinton and Timothy Kaine won the majority vote in California and are qualified for office, [Mr Koller] cannot be constitutionally compelled to vote for them.

Electoral College voting: How the United States decides its president

"[He] must be allowed to exercise his judgment and free will to vote for whomever he believes to be the most qualified and fit for the offices of President and Vice President".

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Mr Koller is trying to persuade some three dozen Republican electors to reject Mr Trump and support another candidate from their party.