In the 2001 elections, he was elected as Congressman to represent the Puno Region, on the list of the centrist Popular Action. He was re-elected in the 2006 elections, on the joint Center Front coalition list which grouped the AP, We Are Peru and the National Coordinators of Independents, and in the 2011 elections on the list of the Possible Peru Alliancelist, this time for the constituency of Lima, and in the 2016 elections for a final term, leaving office in 2019 in aftermath of the dissolution of the Congress by Martín Vizcarra. Lescano was one of the Congressmen who were in favor of the dissolution.