In both Texas and Ohio there are primaries for congressional races today as well as the presidential race. In Ohio there are significant contested primaries in Districts 02, 03, 07, 10, 15, 16, and 18. In Texas, there is a primary to select the Dem candidate against Sen. John Cornyn, as well as big primaries in Districts 07, 10, and 14.
Both Dennis Kucinich and Ron Paul face primary opponents, although neither of them has too much to worry about. Mean Jean Schmidt must survive a primary challenge, and there is a primary on the Dem side of that district, too.
Keep your eyes on these races.