The verdict, coming barely a week before Election Day, increased Stevens' difficulty in winning what already was a difficult race against Democratic challenger Mark Begich. Democrats hope to seize the once reliably Republican seat as part of their bid for a filibuster-proof majority in the Senate.
Stevens says he's not dropping out of his Senate race despite being convicted. He accused the Justice Department of unconscionable behavior in his prosecution and asked Alaskans and Senate colleagues to stand by him as he appeals the conviction. In a statement released by his Senate office, Stevens asserted his innocence and said he would appeal.
Stevens, 84, was convicted of all the felony charges he faced of lying about free home renovations and other gifts from a wealthy oil contractor. Jurors began deliberating last week.
Visibly shaken after the verdicts were read - the jury foreman declaring "guilty" seven times - Stevens tried to intertwine his fingers but quickly put his hands down to his side after noticing they were trembling. As he left the courtroom, Stevens got a quick kiss on the cheek from his wife, Catherine, who testified on his behalf during the trial. He declined to talk to reporters waiting outside.
Stevens faces up to five years in prison on each count when he is sentenced, but under federal guidelines he is likely to receive much less prison time, if any. The judge originally scheduled sentencing for Jan. 26 but then changed his mind and did not immediately set a date.
"If he does get a prison sentence, it almost certainly won't be a very long one and it wouldn't surprise me, given his age and record in Congress, if he were given less than what Martha Stewart got when she lied to authorities," said CBS News legal analyst Andrew Cohen. "She got six months in prison and six months house arrest. I would be shocked if Stevens gets close to that."
The month-long trial revealed that employees for VECO Corp., an oil services company, transformed Stevens' modest mountain cabin into a modern, two-story home with wraparound porches, a sauna and a wine cellar.
The Senate's longest-serving Republican, Stevens said he had no idea he was getting freebies. He said he paid $160,000 for the project and believed that covered everything.
He had asked for an unusually speedy trial, hoping he'd be exonerated in time to return to Alaska and win re-election.
"Coming just eight days before the election, this is big blow for Stevens' hopes of winning re-election," said CBSNews.com senior political editor Vaughn Ververs. "And it's one more piece of really bad news for a Republican Party on the ropes in this campaign year as Democratic hopes for a 60-seat, filibuster-proof majority in the Senate just got a big boost."
Despite being a convicted felon, he is not required to drop out of the race or resign from the Senate. If he wins re-election, he can continue to hold his seat because there is no rule barring felons from serving in Congress. The Senate could vote to expel him on a two-thirds vote.
"Put this down: That will never happen - ever, OK?" Stevens said in the weeks leading up to his trial. "I am not stepping down. I'm going to run through, and I'm going to win this election."
Democrats have invested heavily in the race, running television advertisements starring fictional FBI agents and featuring excerpts from wiretaps.
Stevens' conviction hinged on the testimony of Bill Allen, the senator's longtime drinking and fishing buddy. Allen, the founder of VECO, testified that he never billed his friend for the work on the house and that Stevens knew he was getting a special deal.
Prosecutors played secret phone recordings in which the 84-year-old senator suggested Allen lay low, per his lawyer's advice, reports CBS News correspondent Nancy Cordes.
"They point out that, what's her name, that woman, uh, who went to jail - Martha Stewart - she didn't go to jail because she did something wrong, she went to jail because she lied about a conversation she had with somebody," Stevens was heard saying in the tape.
Stevens spent three days on the witness stand, vehemently denying that allegation. He said his wife, Catherine, paid every bill they received.
Living in Washington, thousands of miles away, made it impossible to monitor the project every day, he said. Stevens relied on Allen to oversee the renovations, he said, and his friend deceived him by not forwarding all the bills.
Prosecutors used a barrage of witnesses to question how Stevens could have been in the dark about VECO's work on the project. VECO employees testified to seeing Stevens at the house. One left him a company business card. Stevens sent thank you notes to others.
Stevens is a legendary figure in Alaska, where he has wielded political influence since before statehood. His knack for steering billions of dollars in federal money to his home state has drawn praise from his constituents and consternation from budget hawks.
There was no immediate word on Stevens' campaign plans. His spokesman, Aaron Saunders, did not immediately return a message seeking comment on whether Stevens would stay in the race.
In Alaska, the Democratic Party issued a statement calling for Stevens to resign immediately. "He knew what he was doing was wrong," the party said. "But he did it anyway and lied to Alaskans about it."
GOP Vice Presidential Candidate and Alaska Gov. Sarah Palin, chided Stevens for falling prey to the "corrupting influence" of big oil.
"The verdict shines a light on the corrupting influence of the big oil service company up there in Alaska that was allowed to control too much of our state," Palin said Monday in a statement. "And that control was part of the culture of corruption that I was elected to fight. And that fight must always move forward regardless of party affiliation or seniority or even past service."
Stevens is the sixth senator convicted of criminal charges. The last previous one was Republican David Durenberger of Minnesota, who was indicted in 1993 on charges of conspiring to make fraudulent claims for Senate reimbursement of $3,825 in lodging expenses. He later pleaded guilty to misdemeanor charges and was sentenced to one year of probation and a $1,000 fine.
The jurors left the court without comment.
Said U.S. District Judge Emmet Sullivan: "The jurors have unanimously told me that no one has any desire to speak to any member of the media. They have asked to go home and they are en route home."
The jurors had been shuttled to and from the proceedings each day by court officials.