There was "no justification" for his being attacked 10 days ago while doing yard work at his home in Kentucky, Paul told the Washington Examiner in his first interview since the incident.
The Republican senator cast votes on Monday and was greeted by Senate colleagues.
Paul was attacked November 3 while mowing his lawn at his home in Bowling Green, Kentucky. He simply expressed his decision to a Senate clerk before chatting briefly with several senators. Paul says he ended up with six broken ribs after a freaky attack by his neighbor last week while he was mowing his lawn.
Chennai man sets ablaze woman, family over unrequited love
While a few reports have claimed that the accused is an engineering graduate, another report stated that he is a college dropout. The 25-year old accused Aakash, who ran away from the spot after committing the crime, was arrested later by the police.
Paul's return was welcomed by President Donald Trump, who tweeted from the Philippines, "Great to see @RandPaul looking well and back on the Senate floor". "I'm just concerned that I was attacked from the back and somebody broke six of my ribs and gave me a damaged lung where at least for now I have trouble speaking and breathing and now I've hurt for 10 days", Paul said.
Paul said he was going to be "ready to fight for liberty" and also work on the upcoming tax reform efforts.
Last week, Boucher, 59, admitted before a judge that he had entered Paul's property and had tackled him from behind although he pleaded "not guilty" to the charge of assault, which could carry a penalty of a year behind bars and a $500 fine.
Trump arrives in the Philippines, Duterte sings him a love song
President Donald Trump has arrived in the Philippines to attend a pair of global summits and close his five-country tour of Asia. Prime Minister Jacinda Ardern will tell the Philippine president there have been too many killings in his war against drugs.
Boucher was immediately arrested, although he was released from jail the next day after paying $7,500 bail and on the condition that he not approach within 305 metres of the Senator and his family.
Boucher is accused of tackling Paul as he climbed off a ride-on mower while wearing ear protectors, meaning he did not hear the hit coming. Paul's senior adviser Doug Stafford has denied the two men had a dispute of any kind, saying Paul had not had a conversation with Boucher in years.
Police charged Rene Boucher with misdemeanor assault. "This was not a 'fight, ' it was a blindside, violent attack by a disturbed person", Stafford said in a statement.
Grigor Dimitrov edges Dominic Thiem on his London debut — ATP Finals
Serving for the match at 5-4, however, he wobbled again as a framed backhand beyond the baseline allowed Thiem a reprieve. Consecutive double faults in the following game saw the Austrian lose serve again - this time to love.
Boucher's attorney, Matt Baker, said it appears Paul has hired a personal injury lawyer, which could mean he is planning a lawsuit.