"No programme like UP Day, which shows North Indians poltical goondaism will be allowed to take place here. We will first request them with folded hands. If that did not work, we will face them with open hands", Thackeray said in an interview to Marathi weekly Lokprabha.

Raj said he did not subscribe to the view that his party's anti-North Indians campaign was unconstitutional.

"One must abide by the basic principles of Constitution. But its intricacies keep changing. Don't we amend the Constitution?" Thackeray said.

"Today's issues were non-existent when the Constitution was drafted. The situation has changed now," he said.

Justifying his objection to influx of migrants into Mumbai, Raj said "am I the only one who has this grievance? Sheila Dixit, Prabha Rau said the same thing (recently). Similar sentiments are expressed in Assam."

"Hasn't somebody said that every generation has its constitution?" Raj added, referring to Thomas Jefferson's quote.