Sen. Kirsten Gillibrand Kirsten GillibrandSuburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits The Hill's Campaign Report: 19 years since 9/11 | Dem rival to Marjorie Taylor Greene drops out | Collin Peterson faces fight of his career | Court delivers blow to ex-felon voting rights in Florida MORE (D-N.Y.) plans to try and block President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE’s pick for U.S. attorney in New York’s southern district, The New York Times reported Wednesday.

Gillibrand, a frequent and vocal critic of the president, will likely use her “blue-slip prerogative” to oppose the nomination of Geoffrey Berman. Senators from the home state of a nominee — in Berman’s case New York — are required to sign off on blue slips for a nominee to be considered.

Gillibrand’s spokesman told The New York Times that the senator would block the nomination over concerns that Trump interviewed Berman for the post directly.

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Politico reported last October that Trump, who prior to the presidency lived in New York City, conducted interviews with Berman and Ed McNally for the U.S. attorney posts in the Southern District of New York and Eastern District of New York, respectively.

The interviews were considered abnormal and prompted concerns from Democratic senators that they amounted to political interference in the appointment process.

Sen. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE (R-Iowa) previously said he would do away with the blue-slip policy for a pair of judicial nominees, arguing that Democratic senators are not returning the slips in an effort to prevent hearings.

Grassley's office told The New York Times on Wednesday that Grassley would honor Gillibrand's blue-slip in this case.

Trump picked Berman to replace Preet Bharara Preetinder (Preet) Singh BhararaDemocratic attorneys criticize House Judiciary Democrats' questioning of Barr Clyburn echoes calls to rename Pettus bridge Support swells for renaming Edmund Pettus Bridge in Selma to honor John Lewis after his death MORE as the top prosecutor in southern New York. His appointment is subject to a confirmation hearing.

Berman served as a federal prosecutor in Manhattan from 1990 to 1994 and currently works as a partner at the Greenberg Traurig law firm, where former New York City Mayor and Trump ally Rudy Giuliani is listed as a shareholder.