In a jolt to the Congress party ahead of the upcoming Lok Sabha elections, several Congress leaders in Rajasthan, including former ministers Rajendra Yadav and Lal Chand Kataria, joined the Bharatiya Janata Party on Sunday. Rajasthan chief minister Bhajanlal Sharma, state BJP president C P Joshi and Union minister Bhupendra Yadav welcomed the Congress leaders to the BJP at the …