Antoni Noguera, the Més coordinator.
Fevitur, had brought the action against Noguera because of the prohibition of apartment holiday rentals in the city.
Palma town hall's Twitter account hacked and filled with insults.
The bullfight, for now, is still due to go ahead on Friday.
The federation was showing support because the mayor faces a lawsuit over holiday rentals.
The Més manifesto will also place a limit on the cost to rent.
The Palma ban "defends the general interest above the financial interests of a few".
Antoni Noguera believes that "ideological motivation and political persecution" are behind his being placed under investigation.
"We don't want racist and xenophobic messages in our city."
Mayor Noguera gave his "state of the capital" speech and received strong criticism from the opposition.
Antoni Noguera: "As mayor of Palma and responsible for the citizens' general interest, I ask that you comply with the law."
Antoni Noguera, "a green politician" - Mr Palma, according to Elle.
Forty-nine per cent rated Palma's management as bad; 37% thought it was good.
"If the Balearics is the region that suffers most from plunder by the Spanish government, then Palma is the most ravaged capital city."
King Felipe and the Royal Family will be arriving in Majorca this week.
The British and German consulates are to cooperate with Palma town hall in tackling drunken tourism, though in Playa de Palma this is principally a German issue.
The reference he made to eighty years was to Emili Darder, the Republican mayor of Palma who was shot by Franco's Nationalists.