It has to do with anti-aliasing. KotOR2 is especially bad about this. All we can really do is minimize it without making edges look too jaggy. 4x AA is usually the best compromise.
If you can live with the jaggies, 2x AA or just turning AA off will close up that line or eliminate it completely.
"They should rename the team to the Washington Government Sucks. Put Obama on the helmet. Line the entire walls of the stadium with the actual text of the ACA.
Fix their home team score on the board to the debt clock, they can win every game 17,000,000,000,000 to 24. Losing team gets taxed by the IRS 100%, then droned."