Without passing a single new law, there are many things the government can do to better enforce laws against illegal immigration
Enforce employer sanctions.
End document fraud and implement REAL ID.
Implement an electronic employment verification system.
Construct the border security fence.
Fully fund the Border Patrol.
Increase interior enforcement.
Increase cooperation with local law enforcement.
Fund increases in detention facilities.
Increase deportations.
Fully implement the entry/exit system.