As United States Postal Service letter carriers face increasing violence and assaults on the job, the police officers who could protect them have been sidelined by the government, a new Raw Story investigation revealed.

With letter carrier robberies skyrocketing by 543 percent between 2019 and 2022, the issue has spurred a bipartisan group of Congress members to introduce legislation aimed at providing more secure mailbox equipment and better protecting letter carriers.

Rep. Brian Fitzpatrick (R-PA), who introduced the Protect our Letter Carriers Act last week, said Raw Story's investigation should urge Congress to turn the bill into law.

“The concerns highlighted in this story only increase the urgency needed in Congress to pass the bipartisan Protect our Letter Carriers Act," Fitzpatrick said in a statement to Raw Story. "The United States Postal Service must have the resources to update its outdated arrow keys and harden mailboxes. We must also increase the prosecution and lengthen sentences of individuals arrested for assaulting and robbing letter carriers. I will do whatever is necessary to work with my colleagues on both sides of the aisle to pass this crucial piece of legislation.”

A 2020 statute reinterpretation by the Postal Service curtailed uniformed postal police officers' ability to patrol the streets where mail crimes typically occur, restricting them to working on postal property such as post offices and distribution centers. Meanwhile, the number of postal police officers overall has shrunk from a high of more than 2,600 in the 1970s to about 450 officers today.

In a phone interview with Raw Story, Del. Eleanor Holmes Norton (D-DC) said mail theft is "rampant" in her district and is an issue she's heard about across the country from her colleagues. Postal police officers aren't currently "doing any good being confined to postal property," Norton said.

"The spike in mail crime only reinforces my notion that we need to have postal police go wherever the crime is," Norton said.

If postal police officers began patrolling the streets again, there would be "a better chance of restricting crimes for the Postal Service," said Norton, who is a co-sponsor of the House version of the Postal Police Reform Act alongside Reps. Andrew Garbarino (R-NY), Ken Calvert (R-CA) and Bill Pascrell (D-NJ).

Calvert himself lost nearly $10,000 in campaign cash last year because of mail theft, Raw Story first reported.

"I think the bill has a good chance of passing not only because of what we're experiencing in the district but because this issue is nationwide," Norton said.

There's a Senate version of the Postal Police Reform Act, as well, introduced by Sens. Dick Durbin (D-IL) and Susan Collins (R-ME), along with 10 other co-sponsors, including Sen. Ben Cardin (D-MD).

“Postal carriers routinely deliver lifelines to Marylanders and others across the country. They should not be left vulnerable to dangerous situations that leave them and mail recipients in potential danger – from theft and the lost items," Cardin told Raw Story in a statement. "This is a growing problem that Congress should address, preferably in partnership with the USPS.”

Read Raw Story's full investigation: Letter carriers face bullets and beatings while postal service sidelines police