STATEN ISLAND, N.Y. -- After a Staten Islander notified Rep. Daniel Donovan that the St. George Post Office has displayed portraits of former presidents during their administrations, but has refused to hang a portrait of President Donald Trump, the congressman is taking action.

"I've been going to the post office in St. George for about 15 years and about a month ago I went and I noticed that the presidential portrait was not hanging on the wall," said Monica Paquette, who claims her local post office displayed portraits of both President George W. Bush and President Barack Obama during their administrations.

But in fact, the post office is following a federal regulation, which Donovan (R-Staten Island/Brooklyn) wants to reverse through legislation he plans to introduce next week.

"Photographs of an incumbent or former President or Postmaster General are not to be displayed in post office lobbies or in common use public service areas such as elevator lobbies and corridors in facilities owned by or leased to the Postal Service. Further, such photographs are not to be requisitioned or purchased by postal installations at Postal Service expense," according to the Code of Federal Regulations (39 CFR 243.2).

According to Donovan, the rule has been in place for decades, but had not been enforced up to this point.

"When people go to the post office or any federal building, they expect to see pictures of their government leaders on display," said Donovan.

The proposed bill would require all United States Post Offices to display the official portrait of the incumbent president and vice president.

The congressman is facing a primary from former Rep. Michael Grimm, who spent eight months in federal prison beginning in 2015.

The primary is set for June 26.