Lawmakers are seeking to interview President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE's longtime secretary, Rhona Graff, as part of their investigation into Russian election meddling, ABC News reported.

Graff, a senior vice president of the Trump Organization, remains a key contact and gatekeeper for Trump among his associates and staff.

"The committee has cast and will continue to cast a wide net," said Senate Intelligence Committee Chairman Richard Burr Richard Mauze BurrRep. Mark Walker says he's been contacted about Liberty University vacancy Overnight Defense: Trump rejects major cut to military health care | Senate report says Trump campaign's Russia contacts posed 'grave' threat Senate report describes closer ties between 2016 Trump campaign, Russia MORE (R-N.C.), who is leading the chamber's investigation into Russian efforts to influence the presidential election.

Graff was mentioned in the email chain that Donald Trump Jr. released about a meeting last year at Trump Tower with Russian lawyer Natalia Veselnitskaya. Trump Jr. took the meeting after he was promised damaging information on Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE.

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British publicist Rob Goldstone, who helped arrange the meeting, in one of the emails suggested that the dirt on Clinton could be given directly to Trump through Graff.

"I can also send this info to your father via Rhona," Goldstone wrote to Trump Jr. "But it is ultra sensitive so wanted to send to you first."

Trump Jr. and Veselnitskaya have since said the meeting was actually about Russian adoption policy.

Rep. Peter King (R-N.Y.) said that "since [Graff's] name is in the email, people will want her to answer questions."

"If you go into Trump Tower, you're going to mention her name."

Graff, who has not been accused of any wrongdoing, has worked at Trump Tower for more than 30 years. She often received and responded to emails on behalf of Trump, who claims to not use email, ABC News learned from sources close to the president.

Trump reportedly would write on printouts of emails provided to him by Graff, who would then respond electronically.