Senator Collins commented on the response after returning to Maine for an event in Norridgewock on Sunday.
The Republican senator said what made up her mind were the interviews from the FBI investigation into the alleged assault against Dr. Christine Blasey Ford.
Those interviewed were people named by Doctor Ford as being present at the party the assault allegedly took place.
"The FBI interviews, and I read every single one of them personally on Thursday, were very helpful in my final decision because they produced no corroborating evidence," said Senator Collins.
Senator Collins said she believes Doctor Ford is a survivor of sexual assault, but according to Collins, the evidence doesn't prove that Kavanaugh was the perpetrator.
When asked about how more than $3.4 million has already been crowdfunded for her opponent in 2020, Senator Collins said the crowdfunding efforts were "clearly an attempt to intimidate me, and I don't react well to that."