The opposition yesterday petitioned the Senate, seeking the impeachment of Senate Speaker Nikom Wairatpanich for denying Democrat MPs the chance to debate during Wednesday's joint parliamentary session.
Opposition chief whip Jurin Laksanavisit led 20 Democrat MPs - all of them dressed in black - to submit the petition to second deputy Senate Speaker Anan Ariyachaipanich at parliament.
The petition was signed by 141 Democrat MPs. Mr Nikom is ex-officio deputy parliament president.
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