WASHINGTON, Feb. 3 - The politically charged methods that states use to draw Congressional districts are under attack by citizens groups, state legislators and the governor of California, all of whom are concerned that increasingly sophisticated map-drawing has created a class of entrenched incumbents, stifled electoral competition and caused governmental gridlock. snip "It's a motherhood-and-apple-pie issue," said a Maryland state delegate, John R. Leopold, a Republican who this year found Democrats embracing his redistricting overhaul legislation after it languished for two years. "We have a situation in this state and this nation where the legislatures are creating our own voters....