Buoyed by big turnouts at Narendra Modi's recent rallies in north-east and south, BJP today claimed there was an "undercurrent" in his favour motivated by anger against the status-quo, and said the party should aim at converting this support into seats. Claiming that such "mammoth" crowds do not appear out of thin air, Leader of Opposition in Rajya Sabha Arun Jaitley said BJP should now try and encash on support for Modi by turning the upcoming Lok Sabha polls into a referendum on Modi.