On Friday, a Chicago Tribune editorial summed up gay marriage in Illinois as a foregone conclusion.

The piece was published in response to a letter to the Sun-Times written by Chicago Mayor Rahm Emanuel.

“Marriage equality is the next step in our nation's march forward,” Emanuel wrote. “Illinois must lead the way.”

Eric Zorne disagreed, saying it's “too late for leadership.”

“All Illinois can do now is hop on the train of history. All the trend lines show it's about to roll over the obstinate states where legislators refuse to recognize the inevitability, if not the wisdom and justice, of same-sex couples getting the same rights to formalize their relationships that are enjoyed by opposite-sex couples,” he wrote.

In February, Illinois state Rep. Greg Harris, along with two other openly gay representatives, Deb Mell and Kelly Cassidy, introduced a bill legalizing marriage for gay couples.

Lawmakers could vote on the measure as early as this month during a lame duck session. Democratic Governor Pat Quinn backs passage of the bill.