South Bend, Indiana, Mayor Pete Buttigieg, who launched an exploratory committee for president on Jan. 23, said on Twitter Thursday that he'll be making a "special announcement" in South Bend on April 14.

Why it matters: Online interest in Buttigieg — a 37-year-old gay veteran and Harvard graduate who speaks 8 languages — has skyrocketed since his CNN town hall, generating more engagement with his tweets (2.10 million interactions) during this period than any other candidate's main account except Beto O'Rourke — with half as many followers. Buttigieg's campaign raised $7 million in the first quarter of 2019.

Go deeper: Everything you need to know about 2020 candidate Pete Buttigieg