Sen. Mark BegichMark Peter BegichAlaska political mess has legislators divided over meeting place Former GOP chairman Royce joins lobbying shop Lobbying world MORE (D-Alaska) late Monday night added his voice to the growing chorus of Democratic senators announcing support for gay marriage ahead of Tuesday's hearing at the Supreme Court.

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"I believe that same-sex couples should be able to marry and should have the same rights, privileges and responsibilities as any other married couple," the Alaskan senator said in a statement obtained by Buzzfeed.

"Government should keep out of individuals' personal lives—if someone wants to marry someone they love, they should be able to. Alaskans are fed up with government intrusion into our private lives, our daily business, and in the way we manage our resources and economy," he continued.

The statement precedes oral arguments at the Supreme Court on Tuesday and Wednesday on a pair of cases examining states' and the federal government's ability to define marriage as a union between a man and a woman.

On Monday, Sens. Mark WarnerMark Robert WarnerTrump nominees meet fiercest opposition from Warren, Sanders, Gillibrand On The Money: Fed chief warns of 'unthinkable' harm if debt ceiling breached | Powell basks in bipartisan praise amid Trump attacks | Federal deficit jumps to 7 billion Fed chief basks in bipartisan praise as lawmakers dismiss Trump attacks MORE (D-Va.) and Claire McCaskillClaire Conner McCaskillTrump nominees meet fiercest opposition from Warren, Sanders, Gillibrand Feds allow campaigns to accept discounted cybersecurity services GOP frets over nightmare scenario for Senate primaries MORE (D-Mo.) also announced their support for gay marriage; last week, Republican Sen. Rob PortmanRobert (Rob) Jones PortmanThe Hill's Morning Report - Presented by JUUL Labs - House to vote to condemn Trump tweet Rising number of GOP lawmakers criticize Trump remarks about minority Dems Hillicon Valley: Harris spikes in Google searches after debate clash with Biden | Second US city blocks facial recognition | Apple said to be moving Mac Pro production from US to China | Bipartisan Senate bill takes aim at 'deepfake' videos MORE (Ohio) and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonWhy Trump's bigoted tropes won't work in 2020 The Hill's Morning Report - Presented by JUUL Labs - House to vote to condemn Trump tweet GOP put on the back foot by Trump's race storm MORE similarly announced shifts on the subject.

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The flood of lawmakers now backing same-sex marriage is partially an indication of shifting national attitudes. A Washington Post / ABC News poll released last week showed that 58 percent of Americans backed gay marriage, an all-time high.