Yesterday, as the AAP government won the trust vote in Delhi assembly with Congress support, Congress leader Digvijaya Singh said that BJP's prime ministerial candidate Narendra Modi should learn austerity and humility from Arvind Kejariwal. "Modi should learn austerity and humility from Kejriwal and Mamta who use Wagon R and Maruti Alto. Shouldn't NAMO be using NANO ?," Singh tweeted.