By Veronica Stracqualursi and Eric Bradner

PENNSYLVANIA (CNN) — Republican Rep. Ryan Costello plans to drop his bid for reelection in the 2018 House election for Pennsylvania’s 6th Congressional District and will retire at the end of his term.

READ MORE: Philadelphia Weather: Chance For Strong To Severe Storms On Tuesday, Damaging Winds

“It’s going to happen,” a Republican familiar with Costello’s plans told CNN without sharing details about the timing.

A spokesman for Costello did not immediately respond to CNN’s request for comment.

READ: 16 Candidates To Run In Pennsylvania’s 5th Congressional District

READ MORE: EXCLUSIVE VIDEO: Large Group Of Noisy Dirt Bikes, ATVs Take Over Radnor Streets

City&State PA previously reported on Costello’s plans.

Pennsylvania’s Supreme Court recently ruled that the state’s congressional districts were gerrymandered and put a new map in place for November’s midterm elections.

The new map favors Democrats in the redrawn district and will be tough for Republicans to hold.

Earlier this week, the US Supreme Court denied a request from Pennsylvania Republicans to block new congressional maps.

MORE NEWS: Philadelphia School District Superintendent Dr. William Hite Will Not Seek Contract Renewal After School Year

(The-CNN-Wire ™ & © 2018 Cable News Network, Inc., a Time Warner Company. All rights reserved.)