After the November 3 attack, Kelly Paul, the senator's wife, made it clear that her husband was attacked by their neighbor and that there was no prior altercation between the two.
Sentencing was set for June 15. Baker says he'll argue for probation. The charge carries up to 10 years in prison and a US$250,000 fine.
Boucher has agreed to pay restitution to Paul in an amount that will be determined at sentencing.
Boucher, a retired anesthesiologist, said he tackled Paul from his blind side because he saw the senator stacking brush into an existing pile.
Paul suffered multiple broken ribs in the attack.
Charged with assaulting a member of congress, Boucher said that the attack was sparked by an argument over their lawns.
The two have always been next-door neighbors in their subdivision, but have disagreed over lawn maintenance. He is now free on bond. He has been released on a $25,000 unsecured bond and is to have no contact with Paul or his family. Paul said the injuries left him in a "living hell". At the time, he said: "It has nothing to do with politics ... it has to do with a disagreement between two neighbors".