Sen. Mark BegichMark Peter BegichAlaska Senate race sees cash surge in final stretch Alaska group backing independent candidate appears linked to Democrats Sullivan wins Alaska Senate GOP primary 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 WarnerThe Hill's 12:30 Report - Presented by Altria - Biden holds meetings to resurrect his spending plan Democrats feel high anxiety in Biden spending conflict Biden meets with Jayapal to kick off week of pivotal meetings MORE (D-Va.) and Claire McCaskillClaire Conner McCaskillEx-Rep. Akin dies at 74 Republicans may regret restricting reproductive rights Sunday shows preview: States deal with fallout of Ida; Texas abortion law takes effect MORE (D-Mo.) also announced their support for gay marriage; last week, Republican Sen. Rob PortmanRobert (Rob) Jones PortmanMcConnell gets GOP wake-up call Biden shows little progress with Abraham Accords on first anniversary The Hill's Morning Report - Presented by Facebook - After high drama, Senate lifts debt limit MORE (Ohio) and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonTrump defends indicted GOP congressman GOP lawmaker says he expects to be indicted over FBI investigation Why it's time for conservatives to accept the 2020 election results and move on 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.