A Wall Is Too Expensive
There is an argument that building a wall or fence along the US-Mexican border would be too costly. Let examine the cost. In fact, let look at the most extensive and extravagant barrier - the Israel security fence. Israel is building a security fence along the West Bank, a 540 miles long fence. According to Relief Web:
The wall, which is estimated to cost Israel $1.5 million U.S. per mile to construct... In some places the wall is a 25-foot-high concrete barrier and in other places a series of razor-wire fences with electronic sensors.
According to Wikipedia, the US-Mexican border is 2,067 miles. Multiply that by $1.5 million we arrive at $3,100,500,000. Our Federal Budget is $2.119 trillion. The Bridges To Nowhere alone costs us $453 million. According to Porkbusters there are $23,345,344,262 in porks identified in fiscal year 2006.
Decide for yourself if building the wall would be too expensive.