Arvind Kejriwal celebrates his first anniversary as Delhi chief minister on February 14, Valentine’s Day, but love is certainly not in the air. If anything, he faces a mounting litany of challenges, best symbolised by the piles of garbage at street corners, courtesy striking municipal workers. Government hospitals have been shut, as have schools, while he was away undergoing therapy at a Bangalore health farm, but clearly his biggest challenge lies with his running battle with a resident of the “smart city” part of his domain: Prime Minister Narendra Modi.