Administration says it would support an expert review of signature to determine whether it was Trump who signed it

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White House officials on Tuesday doubled down on their assertion that a sexually suggestive letter carrying what appeared to be Donald Trump’s signature that was included in a birthday book for convicted sex offender Jeffrey Epstein had not been signed by the president.

The letter, and its drawing of a naked woman’s torso around an imagined conversation between Trump and Epstein, was part of a batch of documents released by the House oversight committee in response to a subpoena after its existence was first reported in July by the Wall Street Journal.

The release of the letter and the entirety of the birthday book only intensified a furore that Trump has been attempting to shut down for months – and hardened the White House’s resolve to claim the purported Trump signature on the letter was a fabrication or a forgery.