As gay marriage continues to become legalized state by state, a recent poll shows 55 percent of Americans approve of it, according to The Washington Times.

The Gallup survey shows support for same-sex marriage has increased two points since 2013 and is the highest it's ever been since it was first asked in 1966 -- when 68 percent of Americans opposed it. 

The continual increase for pro-gay marriage attitudes is attributed to so many state courts striking down bans on it, Gallup said.

"Proponents of marriage equality, years of playing offense have finally paid off as this movement has reached a tipping point in recent years - both legally and in the court of public opinion," Gallup reported. "Gay marriage supporters' game strategy has officially pivoted to challenging state bans in court. ... Younger Americans are more supportive of same-sex marriage, and this will likely continue to drive overall support at the gradual pace it has increased over recent years."

However, the south, where "traditional marriage advocates still hold a majority of support," remains more stubborn about evolving their views on same-sex unions.

"Public opinion in southern states will be a barometer to observe as the bulk of future legal battles will play out there in the months and years to come," Gallup said.

Upon release of the poll, several lawmakers took to social media sites to express their support.

"More people than ever know that #loveislove. My kids will see so much progress for LGBT Americans in their lifetime!" Florida Rep. Debbie Wasserman Schultz tweeted.

The poll was conducted between May 8 and 11 via telephone and included 1,028 adults, the Times said.