Gee, what's he going to say?

An image from the state senator's Facebook page.

State Sen. Daniel Biss (D-Evanston) sent out teaser emails to his supporters this afternoon inviting them to join him for a Facebook Live video presentation at 10 a.m Monday of what he called "exciting news."

It's widely anticipated that Biss will be announcing that he plans to run for governor next year.

Biss could be joining what's shaping up to be a crowded field in the Democratic primary. Chicago businessman Chris Kennedy has already announced his candidacy, as has Chicago Alderman Ameya Pawar.

Entrepreneur and investor J.B. Pritzker has formed an exploratory committee for a run and state Sen. Andy Manar of Bunker Hill, also is considering a bid.

Biss has represented Evanston in Springfield since 2010.