Kumar is known for speaking his mind—bluntly. In response to the 2002 Gujarat riots, Kumar, then a Union minister, said that if he were the CM of the state, he would have resigned (Narendra Modi was the Gujarat CM then). Whether it was the multi-crore Vyapam scam in Madhya Pradesh, allegations of corruption against the BJP government in Himachal Pradesh in 2002-2003 or the Bangaru Laxman tape scandal, he did not hesitate to raise his voice. As the Karnataka party in-charge, he took a stand against CM B.S. Yediyurappa due to allegations of corruption and nepotism against him in 2010.