Well... isn't that better than artificially designing a strange non-district? The purpose of congressional districts in not to make the party representation exactly equal, but to provide each general area with a way to be represented in Congress. We KNOW some will vote Democratic and some Republican.... different areas do that.
*I* don't want lines drawn in MY state that group ME with some distant county just to get more Democrats in Congress. As a matter of fact, since I live in an urban area, (MD-8) that is unlikely....but rural areas sometimes find that their area is shaped like a dumbbell, with 2 blobs connected by 20 miles of narrow highway.