President Donald Trump on Wednesday was critical of "sneaky" Feinstein.
In a statement accompanying the release of the Simpson transcript Tuesday, Feinstein said "the American people deserve the opportunity to see what (Simpson) said (about the dossier) and judge for themselves".
Adds Trump: "Must have tough Primary!"
Senate Judiciary Chairman Chuck Grassley, R-Iowa, was sharply critical of Feinstein's decision to release the transcript without consulting with him first. He also again lashed out at the investigations of Russian meddling in the 2016 election, urging Republicans to take control of the inquiries and repeating his claim that they are on a "witch hunt". As The Hill explains, a challenging primary is unlikely as California's primary system rewards the highest two finishers, no matter party affiliation, and Feinstein's only notable challenger at this level is a Democrat.
President Donald Trump slammed Senate Judiciary ranking member Dianne Feinstein for releasing the transcript of Fusion GPS leaders' testimony to the panel, calling her "sneaky" and suggesting - without evidence - she might have broken the law. "Republicans should finally take control!" he wrote.
In a separate Tweet, Trump referred to the Russian Federation investigation as the "single greatest Witch Hunt in American history".
"The innuendo and misinformation circulating about the transcript are part of a deeply troubling effort to undermine the investigation into potential collusion and obstruction of justice", Feinstein, a California Democrat, said in a statement.
"It's totally confounding that Senator Feinstein would unilaterally release a transcript of a witness interview in the middle of an ongoing investigation - a witness that Feinstein herself subpoenaed past year for lack of cooperation", Grassley's press secretary said in a statement.
"There was no collusion, everybody including the Dems knows there was no collusion, & yet on and on it goes". Grassley said he was "confounded" by the release and argued that it could undermine attempts to get additional witnesses. Simpson is the co-founder of Fusion GPS, a political intelligence firm which compiled the infamous Trump dossier. Special counsel Robert Mueller's investigation is continuing, and his probe so far has resulted in charges against four of Trump's campaign advisers.