(CNN) - Sen. Susan Collins, a Republican from Maine, indicated her support Wednesday for same-sex-marriage, becoming the fourth sitting Republican senator to do so.
“A number of states, including my home state of Maine, have now legalized same-sex marriage, and I agree with that decision,” Collins said according to the Bangor Daily News in response to one of its reporter's questions.
She joins Republican Sens. Mark Kirk of Illinois, Lisa Murkowski of Alaska and Rob Portman of Ohio in expressing support for the marriage equality movement.
A moderate voice in the GOP, Collins is up for re-election this year, which she is expected to win.
Same-sex marriage is legal in 19 U.S states and the District of Columbia.
A major gay rights group, the Human Rights Campaign, also threw its support on Wednesday behind the incumbent Republican's re-election.