WASHINGTON - APRIL 24: Former U.S. President Bill Clinton and his wife U.S. Senator Hillary Clinton (D-NY) stand near their portraits during an unveiling ceremony at the Smithsonian April 24, 2006 in Washington, DC. President Clinton's portrait will hang in the National Portrait Gallery's "America's President's" exhibit. (Photo by Mark Wilson/Getty Images) Former President Bill Clinton and his wife Hillary Clinton stand near their portraits during an unveiling ceremony at the Smithsonian on April 24, 2006 in Washington, D.C. (credit: Mark Wilson/Getty Images)

WASHINGTON (CBSDC) — The artist who painted Bill Clinton’s portrait for the National Portrait Gallery claims that he slipped in a Monica Lewinsky reference into the painting.

Nelson Shanks told the Philadelphia Daily News that he “subtly” incorporated Lewinsky’s infamous blue dress into the 2006 portrait.

“The reality is he’s probably the most famous liar of all time. He and his administration did some very good things, of course, but I could never get this Monica thing completely out of my mind and it is subtly incorporated in the painting,” Shanks said.

He explained that he put a shadow of the blue dress into the painting.

“If you look at the left-hand side of it there’s a mantle in the Oval Office and I put a shadow coming into the painting and it does two things,” Shanks told the Daily News. “It actually literally represents a shadow from a blue dress that I had on a mannequin, that I had there while I was painting it, but not when he was there. It is also a bit of a metaphor in that it represents a shadow on the office he held, or on him.”

Shanks claims that that Clintons want the portrait removed from the gallery.

“And so the Clintons hate the portrait. They want it removed from the National Portrait gallery,” he told the Daily News. “They’re putting a lot of pressure on them.”

The National Portrait Gallery denied the claim to the Daily News.

The Wall Street Journal is reporting that the former president’s wife, Hillary Clinton, will likely enter the presidential race in April.