As City Councillor, he was the creator of the first law in Brazil to ban the use of tobacco in common places.

In 2010, he was elect State Deputy for the 17th Legislature (2011-2015)[2] with more than 66,000 votes and present a law project, improved by the then Governor Geraldo Alckmin, which punishes with a fine or closing the establishments which sell alcoholic beverages to children and teenagers.

At 33-years-old, he ascended to the office of President of the Legislative Assembly, elect for the biennium 2017/2019, with 88 of the 94 votes of the House.

[3] In an article published by Folha de S. Paulo, on 6 June 2017, Macris defended the leaving of the PSDB from the Michel Temer administration.

[4] On 15 March 2019, he was re-elect President of the Assembly, receiving 70 votes against 16 of his main opponent, Janaína Paschoal (PSL).