Long before the ‘rainbow wave,’ there was Tammy Baldwin.

Sen. Tammy Baldwin, D-Wis., celebrates winning re-election last month with supporters in Madison, Wisconsin. (Steve Apps / Wisconsin State Journal via AP)

The midterm elections ushered in a record number of LGBTQ people to elected office. But long before that “rainbow wave” — and before it was even a ripple — Sen. Tammy Baldwin of Wisconsin, an out lesbian, was slowly chipping away at…