Enforce system that already exists
I travel internationally once a year and when I return to the United States, everyone has to show a passport or they don't even get on the plane; if you slip through the cracks and get on a plane you can't get through the terminal here without it. But the politicians want you to let illegal immigrants just walk in over our southern border.
President Obama is to blame for the open border policy on the southern border, but our politicians we send to represent us could force enforcement of our border laws, but they don't want to lose the votes.
When you go to the polls between now and the elections in 2016, I encourage you to vote against any person who has already served two terms in their current position, doesn't matter, Democrat or Republican.