Sentence:  The landslide victory of Peau Thai, sweeping 53% of the seat shares, was without a doubt due to the strength of its <WSD>Red Shirt</WSD> supporters. 
Meaning of the word marked with <WSD> tags:  A member of the UDD (National United Front for Democracy), supporters of Prime Minister  Shinawatra, (and subsequently Abhisit Vejajiva) in the conflict in Thailand after the 2006 coup d'etat.