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Former special counsel Robert Mueller told the House Intelligence Committee Wednesday that his investigation is "absolutely" not a "witch hunt" and that Russian interference in the 2016 election is not a "hoax."

Why it matters: This was one of several moments in back-to-back hearings Wednesday in which Democrats were able to get Mueller to knock down some of President Trump's favorite false claims. In the 24 hours alone leading up to Mueller's testimony, Trump tweeted the phrase "Witch Hunt" 4 times.

Trump's tweets saying "witch hunt" just 24 hours before the hearing.

Go deeper: 4 big moments from Robert Mueller's testimony on obstruction

Go deeper

Trump threatens to veto Defense spending bill over social media shield

Photo: Erin Schaff - Pool/Getty Images

President Trump tweeted Tuesday a threat to veto a must-pass end-of-year $740 billion bill defense-spending authorization bill unless Congress repeals a federal law that protects social media sites from legal liability.

Why it matters: Trump's attempt to get Congress to end the tech industry protections under Section 230 of the Communications Decency Act is the latest escalation in his war on tech giants over what he and some other Republicans perceive as bias against conservatives.

The walls close in on Trump

Photo: Tasos Katopodis/Getty Images

With Bill Barr's "Et tu, Brute!" interview with AP, President Trump is watching the walls close in on his claims of fraud, hoaxes and conspiracies.

Why it matters: Trump and his legal team continue to claim election fraud. But the Republican governors of Arizona and Georgia have certified their elections, a loyalist like Barr has weighed in, and lower-ranking officials have taken potshots.

Congress plots COVID pandemic-era office upgrades

oving crates outside Rep. Elise Stefanik's old office Tuesday. Photo: Bill Clark/CQ-Roll Call, Inc via Getty Images

The House plans to renovate members' suites even though staff are worried about an influx of contractors and D.C. is tightening restrictions on large gatherings, some staffers told Axios.

Why it matters: The Capitol has been closed to public tours since March. Work over the holiday season comes as U.S. coronavirus cases spike, Americans beg for more pandemic assistance and food lines grow.