Sen. Mark BegichMark Peter BegichPerez creates advisory team for DNC transition The future of the Arctic 2016’s battle for the Senate: A shifting map 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 WarnerGun control debate shifts to hardening schools after Texas shooting Warner: Why doesn't Trump understand that it's illegal for other countries to interfere in US elections? Warner sees 'credible components' in report that foreign governments offered to aid Trump campaign MORE (D-Va.) and Claire McCaskillClaire Conner McCaskillCalif. gov candidates battle for second place Senate panel advances Trump's CIA nominee Five votes to watch in fight over Trump's CIA nominee MORE (D-Mo.) also announced their support for gay marriage; last week, Republican Sen. Rob PortmanRobert (Rob) Jones PortmanEx-McConnell policy aide joining lobby firm WATCH: Sen. Flake: “More doubtful” North Korean summit will happen  Lobbying world MORE (Ohio) and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonClinton backs Georgia governor hopeful on eve of primary Pressure rising on GOP after Trump–DOJ fight’s latest turn Press: Why Trump should thank FBI 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.