Because gun control is a radioactive issue.  And why is it radioactive?  Because most Americans like their freedom to own guns.

WASHINGTON (CNN)—Is the Virginia Tech tragedy likely to put gun control on the political agenda? Don’t bet on it. In recent years, gun control has been an issue most politicians prefer to stay away from.

The last significant gun control measures to make it through Congress were the Brady bill in 1993 and the assault weapons ban in 1994.

And what happened? Democrats lost control of Congress for 12 years. President Clinton said the gun lobby had a lot to do with his party’s defeat. Democrats have been gun-shy ever since.

There will be some agitating from the usual suspects in the wake of the Virginia Tech massacre, but ultimately it’ll probably fail.  Maybe some token bit of legislation will pass, but the reality (despite what gun control nuts like to think) is that most Americans feel we have more than enough gun control.