Bengaluru: The ruling Congress in Karnataka won three seats and the BJP one in the Rajya Sabha elections in Karnataka on Tuesday, which were marred by cross-voting in a setback to the saffron party.Ajay Maken, G C Chandrasekhar and Syed Naseer Hussain, all from the Congress, and Narayansa K Bhandage (BJP) got elected to the Upper House in the polls in which elected MLAs were the voters.Five candidates, including D Kupendra Reddy of the JD(S) who lost the election, were in the fray for the four seats.