The back-and-forth rhetoric comes as Noah Feldman, the Harvard Law School professor who testified for Democrats at the impeachment inquiry earlier this month, wrote an explosive op-ed asserting that if Democrats do not forward the impeachment articles to the Senate as dictated by the Constitution, then Trump was never even impeached at all. The Constitution dictates that after impeachment by a majority in the House, a two-thirds vote is needed in the Senate to remove a president from office.
Feldman cautioned that impeachment "means the House sending its approved articles of impeachment to the Senate, with House managers standing up in the Senate and saying the president is impeached."
Therefore, "if the House does not communicate its impeachment to the Senate, it hasn’t actually impeached the president," Feldman said." If the articles are not transmitted, Trump could legitimately say that he wasn’t truly impeached at all."
https://www.foxnews.com/politics/mcconnell-impasse-trump-impeachment-trial-dems-cold-feet