(CNN) —  

Five staffers serving a freshman Democratic congressman resigned on Sunday after sources said he was intending to switch to the Republican Party.

The aides to New Jersey Rep. Jeff Van Drew – Javier Gamboa, Edward Kaczmarski, Justin M. O’Leary, Mackenzie Lucas and Caroline Wood – wrote in the letter that they can “no longer in good conscience continue our service in the Congressman’s employ.”

Read the letter below.