A day after he advocated a tie-up with the Maharashtra Navnirman Sena for the Lok Sabha elections, NCP leader Ajit Pawar Wednesday met MNS chief Raj Thackeray in Mumbai. Pawar later said that the decision on alliance with the MNS would be taken by the senior leadership of the NCP and Congress. The meeting between Pawar and the MNS chief, who have in the past engaged in verbal sparring, took place in Dadar in central Mumbai. The meeting lasted for about one and a half hours, NCP sources said.