Moderate Republican Sen. Susan Collins said Sunday she "strongly" supports establishing an independent commission to examine the Jan. 6 attack on the U.S. Capitol, but there are still issues -- although resolvable -- with the proposed legislation that passed the House of Representatives in a bipartisan vote Wednesday.
"I strongly support the creation of an independent commission. I believe there are many unanswered questions about the attacks on the Capitol on Jan. 6," Collins said during an exclusive interview on "This Week," adding that answers are needed for why law enforcement wasn't better prepared for the attack.
Republican leadership in the House and Senate -- and Trump -- came out against the proposed commission. Collins, as one of the seven Republican senators who voted to convict Trump, is one of the most likely "yes" votes on the GOP side, but that small group of Republicans is already differing from their House counterparts with North Carolina's Richard Burr coming out against the bill, even though he voted to convict Trump in the impeachment trial.
However, the Maine senator told ABC News' George Stephanopoulos she's "optimistic."
The issues Collins identified as "resolvable" regard staffing and the timeline. While the makeup of the proposed commission is evenly split between Republican and Democratic lawmakers, Collins said there should also be an equal number of staff members appointed by each side. Additionally, she said the report must be done this year. Collins previously told ABC News she was concerned "there could be manipulation to make it go over into the election year for partisan purposes."
"There's plenty of time to complete the work," she said Sunday. "And I'm optimistic that we can get past these issues based on the conversations I've had with the speaker of the House and the House majority leader."
Stephanopoulos also pressed Collins on infrastructure plan negotiations between Senate Republicans and the White House. Progress stalled Friday when the group of Republicans negotiating with the administration rejected a counteroffer that lowered the price tag from more than $2.2 trillion to $1.7 trillion -- still more than $1 trillion more than the latest GOP offer.
Collins said she thinks negotiations should continue, but said there is still a "fundamental difference" between the two parties on what qualifies as infrastructure, with Republicans viewing it more conventionally -- roads, bridges, broadband, etc. -- and President Joe Biden wanting to include what Collins called "social programs."
Collins said this is a moment that will set the tone for the rest of President Joe Biden's administration.
"I think we're still pretty far apart, but this is the chance," Collins said. "This will determine whether or not we can work together in a bipartisan way on an important issue."
Collins also denied prior knowledge of an alleged scheme by a defense contractor to illegally funnel money to support her 2020 reelection campaign, as reported by Axios.
"Absolutely not. I was not aware at all," Collins said, when pressed by Stephanopoulos. "This is not an investigation of me. It's not an investigation of Collins for Senator campaign. It's an investigation of a single donor among the hundred thousand donors that I have. If he has done something wrong ... then he should be pursued by the FBI."