Campaigning for Thailand’s February 8 general election has begun with a frenetic three-way battle defined by corruption allegations, a tense border conflict with Cambodia and the emergence of a new frontman for the once all-conquering Shinawatra political dynasty.But the caravans of politicians criss-crossing the nation and blitzing social media have so far failed to inspire a public, which has seen its electoral choices repeatedly nullified by courts and coups, as conservatives find ways to...