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.

"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 WarnerOvernight Tech: What we learned from Zuckerberg's media blitz | Opening arguments in AT&T-Time Warner trial | Trump plans new tariffs on China Overnight Cybersecurity: House Intel votes to release Russia report | House lawmakers demand Zuckerberg testify | Senators unveil updated election cyber bill Dems urge Trump to appoint science adviser MORE (D-Va.) and Claire McCaskillClaire Conner McCaskillKoch-backed group launches six-figure ad buy against Heitkamp GOP Senate candidate slams McCaskill over Clinton ties Dems meddle against Illinois governor ahead of GOP primary MORE (D-Mo.) also announced their support for gay marriage; last week, Republican Sen. Rob PortmanRobert (Rob) Jones PortmanLawmakers introduce bipartisan bill to speed up infrastructure permitting Overnight Tech: Zuckerberg breaks silence on Cambridge Analytica controversy | Senate passes sex trafficking bill | EU pushes new tax on tech | YouTube toughens rules on gun videos Senate passes controversial online sex trafficking bill MORE (Ohio) and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonWhite House would like to see Biden ‘in the boxing ring’ in 2020 House Judiciary chair subpoenas DOJ for FBI documents The suit to make Electoral College more ‘fair’ could make it worse MORE similarly announced shifts on the subject.

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.