DENVER, Colo. -

Colorado Gov. John Hickenlooper said he'll call lawmakers into a special legislative session Wednesday to resolve a bill supporting civil unions for same-sex couples, along with several other bills.

Hickenlooper's announcement on the final day of the 2012 regular session was sparked by what he called an "overwhelming need" to discuss the civil unions measure. It died late Tuesday on legislative maneuvering from the GOP.

Hickenlooper said he'd announce the details of the special session Thursday.

Republican House Speaker Frank McNulty did not immediately respond to a call. Democrats accused him of refusing to call civil unions for a vote, even though it had enough support to pass.

Minutes before the decision, President Barack Obama announced he now supports same-sex marriage.

Obama says he has concluded that it is important for him to affirm that he thinks same-sex couples should be able to get married. He says he came to the conclusion over the course of several years of talking to family and friends.

Obama has previously said his personal views of gay marriage were evolving, a stance that frustrated gay rights supporters.

Obama revealed his support for gay marriage in an interview with ABC News.