There was speculation in December of last year that Affleck would run for Senate in Massachusetts, to replace Secretary of State John KerryJohn KerryCO2 tax support is based in myth: Taxing essential energy harms more than it helps Kerry says he's 'hopeful, not confident' that China will cooperate on emissions Overnight Energy: EPA pledges new focus on environmental justice | Republicans probe EPA firing of Trump-appointed science advisers | Biden administration asks court to toss kids' climate lawsuit MORE. Affleck, a Boston native, and Kerry are close. The actor campaigned for Kerry's presidential campaign in 2004.

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But Affleck opted not to run and has seen his Hollywood career flourish: His film "Argo" won the Academy Award for Best Picture earlier this year.

Affleck has remained politically active through his Eastern Congo Initiative and he's testified on Capitol Hill about ending the war in the Congo. He also held a fundraiser for Massachusetts Democrat Elizabeth WarrenElizabeth WarrenOn The Money: Biden .5T budget proposes major hike in social programs | GOP bashes border, policing provisions Overnight Defense: Biden proposes 3B defense budget | Criticism comes in from left and right | Pentagon moves toward new screening for extremists POW/MIA flag moved back atop White House MORE's 2012 Senate campaign.

Garner said she would support her husband if he makes the political leap.

"I'm along for the ride," she told the magazine.