As they promised, Pennsylvania Republicans filed a lawsuit challenging the new state Supreme Court imposed congressional map. They hope a federal judicial panel will stay the implementation of the new map so that they can still run the 2018 elections under the previous district lines. It is likely the US Supreme Court will address this issue, and on a fast track. The re-scheduled Pennsylvania candidate filing deadline is March 20th, so if this new map is to be replaced, such action will have to come very quickly.
The Rundown Blog
Learn more about the candidates running in key elections across the United States.