Interesting idea! I haven't thought this through completely, but I think I'd expect the opposite. Gerrymandering works by designing districts in which your opp

Interesting idea! I haven't thought this through completely, but I think I'd expect the opposite. Gerrymandering works by designing districts in which your opponent wins by huge margins (among other things). Close races can happen for lots of reasons, but they don't generally happen in an situations we recognize as gerrymandered.