The committee's already produced *results*. I see no sign of 'overstepping':
Two witnesses, Steve Bannon and Mark Meadows, have been held in criminal contempt of Congress for refusing to testify; Bannon was indicted by a federal grand jury. The committee, as reported by The Washington Post in December 2021, was considering recommending that the U.S. Department of Justice open a criminal investigation into Donald Trump's involvement.
The committee's findings may also be used in arguments to hold individuals legally accountable. For example, Representative Liz Cheney, who serves on the committee, suggested that Trump may have committed a felony by obstructing the electoral certification proceedings. There are different types of obstruction; in this case, it could carry a relatively high maximum sentence of 20 years. Seditious conspiracy, a charge brought against individuals including the leader of the Oath Keepers, is a possible charge for Trump. The committee was also considering wire fraud criminal referrals against Republicans who raised money off assertions of a stolen election they knew to be untrue. The U.S. Department of Justice has the authority to bring criminal charges against political leaders. Congress sometimes recommends criminal charges, but a "recommendation" or "referral" has no legal force in itself.
The effectiveness of this strategy is disputed. Reports by the US House of Representatives Committee on Homeland security have found fusion centers to be a national asset, though they have at times raised concerns about the ability to evaluate their effectiveness. A 2012 Senate report analyzed 13 months of fusion center reports and found no instances where they helped uncover or prevent a terror attack. The American Civil Liberties Union and the Department of Homeland Security have separately raised concerns about the threats fusion centers pose to privacy rights such as excessive secrecy, little oversight, and mission creep. The actions of individual fusion centers have also been criticized for actions such as labeling universities as terrorism threats, targeting third party candidates and supporters as potential militia members, and incorrectly blaming a faulty water pump on Russian hackers.