Bill Clinton's official portrait contains hidden Monica Lewinsky allusion

The artist who painted the official portrait of Bill Clinton currently hanging in the National Portrait Gallery admitted that he slipped in a sly reference to Monica Lewinsky in the picture.

In a recent interview with the Philadelphia Daily News, artist Nelson Shanks said that the shadow on the left side of the portrait was cast by a mannequin in a blue dress, a nod to the president's affair with his 22-year-old intern, ABC News reported.

Shanks, who described Clinton as "the most famous liar of all time," also mentioned that the shadow represents a metaphorical "shadow on the office he held."

According to Shanks, the Clintons are pressuring the National Portrait Gallery to remove the painting. However, a museum spokesperson told that they have not received any requests from the Clintons to remove the portrait.