Maybe because a sufficiently large number of people got enough pissed off about the subject to force Congress to act. That "is" basically what is happening. Congress really has no interest in restricitng illegal immigration, but they are catching enough flak from their constitutents that they are being forced into it.
"Explain how passing new laws would allow you to apprehend and deport 3 million illegals per year, while they are still streaming in, because there is no fence. Don't forget there are already millions here now to deport. "
Maybe because those laws would drastically increase the number of immigration enforcement officers, and streamline and simplify the rules so deportation is faster and easier.
If these things are done, the fence won't be needed. If they are NOT done, the fence will do no good.
The "Wall" is enough of a symbol that the majority of the Mexican "Peons" will pay heed and stay home. Mezico has a lot of "house cleaning" to do. We here in America can no longer take on Mexico's responsiblities. If anyone left in Mexico has any "cajones" they will take care of the problem themselves. Quit expecting America to take your problems. Hey you Mexican macho pukes get after the problem head on!!! Don't try to dump it on the USA. You bunch of weinies!!!