(CNN) - In 2008, during her brief time as governor of Alaska, Sarah Palin teamed up with a Fairbanks Republican activist named Joe Miller in an unsuccessful effort to oust Alaska GOP Chairman Randy Ruedrich.
Two years later, Palin is backing Miller's campaign to take down a bigger target: Sen. Lisa Murkoswki.
Palin endorsed Miller's Senate candidacy on her Facebook page Wednesday with the proclamation: "Contested primaries are so good for America's political process!"
"I share Joe's belief that we are at a critical time in our nation's history and the status quo will no longer do," Palin wrote. "Unfortunately, Lisa Murkowski and much of the political establishment have recently evolved into being a bigger part of the big government problem in Washington, and they've strayed from the principles upon which they had espoused."
The endorsement had been rumored for weeks, after Todd Palin appeared at a Wasilla fundraiser with Miller in May.
Though Palin claimed in her missive that there is no "feud or bad blood" between herself and Murkoswki, their differences have been well-documented.
Palin captured the governorship in 2006 after defeating then-Gov. Frank Murkowski, Lisa's father, in that year's Republican primary. And when Palin quit as governor last summer, Murkowski said she was "deeply disappointed" and accused Palin of abandoning the state.
Palin's move was followed by rumors that she might challenge Murkowski for her Senate seat, but that chatter abated after Palin's political action committee donated to Murkowski's re-election bid. But in her Facebook post Wednesday, Palin wrote that the donation did not constitute an endorsement.
She questioned Murkowski's commitment to opposing President Obama's agenda and said it's time for a "bold reformer" like Miller, an attorney and former judge. Miller spoke at an Anchorage Tea Party event last September and claimed that Obama wants to turn the country into a "bastion of socialism."
The Republican primary is set for August 24.