Duh.
Check it out:

When it comes to keeping guns out of the hands of criminals, 63 percent of Americans remain unconvinced that tighter restrictions on buying and owning guns will be effective, according to the latest Reason-Rupe poll. About a third (32 percent), said stricter regulations would be effective in preventing criminals from obtaining guns.

Seven in ten Republicans say stricter gun regulations would not be effective while just 26 percent say they would be effective. Democrats are more divided on the issue.