Washington DC - Rudy Giuliani is the latest associate of former President Donald Trump to come under the microscope of the Congressional panel investigating the January 6 attack on the Capitol.

The House select committee is "going through the process" of seeking the disgraced former NYC mayor’s testimony, chairman Rep. Bennie Thompson, a Democrat from Tennessee, told CNN Tuesday.

The committee has not so far issued either a subpoena to Giuliani or a letter asking him to cooperate voluntarily.

Giuliani did not respond to a request for comment.

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A key speaker at the January 6 Stop the Steal rally, Giuliani urged thousands of Trump supporters to put Congress under "trial by combat" over their plans to certify President Biden’s election victory. In response to a lawsuit filed by California Rep. Eric Swalwell, the one time presidential hopeful defended his speech as "clearly hyperbolic" and claimed that "no reasonable listener" would take it literally – even though that’s exactly what the violent crowd of thousands did.

Given that he was serving as the former president’s personal lawyer at the time, Giuliani may have a stronger argument than some other Trump acolytes for refusing to testify before the committee’s probe, which the former president decries as a witch hunt.

Either way, the 77-year-old has enough legal troubles to contend with as it is. Federal prosecutors have been investigating his role in the 2019 Ukraine scandal that led to Trump's first impeachment. Although Giuliani hasn't been charged with a crime, FBI agents raided his offices last year and seized several devices.

The January 6 panel also wants to hear from former Vice President Mike Pence, who was targeted for assassination by the rioters. Thompson said they expect to contact Pence by the end of January.