"Heartiest congratulations to Modi ji and Shah ji for the historic and grand win in Assam," Fadnavis tweeted.
"Assam victory and BJP's entry in Legislative houses of Kerala and West Bengal is only because of toiling of lakhs of karyakartas. My salutes," the CM said in another tweet.
He also congratulated Mamata Banerjee and Jayalalithaa for their victories in West Bengal and Tamil Nadu, respectively.
Meanwhile, the Sharad Pawar-led NCP today said it will be part of the LDF government in Kerala.
Meanwhile, Shiv Sena president Uddhav Thackeray said
the election results have shown that regional parties have a big role to play in national politics.
"Wherever regional parties are strong, people there give preference to these parties," Uddhav told reporters at his residence in suburban Bandra.
"This is a good sign and naturally, the responsibility of regional parties in tomorrow's national politics is going to be big," the Sena president said.
"I am sure all the regional parties will behave accordingly," he said.
Asked about BJP's performance in Assam, Uddhav said, "I am hopeful that the infiltration in Assam from across Bangladesh will be stopped soon by taking harsh measures.
