In front of tens of thousands of supporters in Bangkok, a Thai protest leader promised to keep the city shut down for as long as necessary.<br/> <br />(SOUNDBITE) (Thai) PROTEST LEADER, SUTHEP THAUGSUBAN, SAYING:<br/> <br />"This 'Shutdown Bangkok' will go on until we know whether we have won or lost. There is no time limit."<br/> <br />With whistles, clappers and flags, protesters are occupying parts of central Bangkok.<br/> <br />It's part of a festive citywide drive called "Shutdown Bangkok, Restart Thailand."<br/> <br />It's designed to pressure the government into widespread reforms.<br/> <br />The chief demand is the resignation of Prime Minister Yingluck Shinawatra.<br/> <br />Shinawatra invited opposition leaders for a meeting Wednesday to discuss an election commission, but protesters have rejected that invitation.<br/> <br />(SOUNDBITE) (Thai) ANTI-GOVERNMENT PROTESTER, PORNSAK SATSAWATECHA, SAYING:<br/> <br />"What they were trying to do is buy time, we cannot trust them. The only way that they can be trusted is when t
