The investigation by attorneys general in 50 U.S. states into banks’ foreclosure practices is on “a fast track” and any resolution might involve multiple settlements, Iowa Attorney General Tom Miller said. “We’d like to resolve this sooner rather than later,” Miller, who is leading the attorneys general task force, said in an interview. “We want to move quickly if we can, but not so quickly that we don’t do it right.” A global settlement of the task force investigation is unlikely, said Miller, 66, who also leads a separate foreclosure prevention group of state attorneys general. “It would be one bank at a time.” Miller, who was first elected attorney general in 1978 and whose successes include $809 million from two earlier settlements over home loans, didn’t speculate on when or how this investigation might be resolved.