In response to the Virginia Tech shootings, the President has signed a bill (H.R. 2640) into law that would require all states to submit information to the National Instant Criminal Background Check System (NICS).
According to statements by Rep. McCarthy, the law was necessary because not all states submit complete information. For example, not all states enter the records of those deemed mentally defective into the NCIS system. And for some states that do have complete information, the data is not automated, so it cannot be entered into the NCIS system.