Why did Obama say enforcing Immigration laws was "Misguided"?

He promised Hispanics certain things for their votes and now he's got problems. His healthcare reform bill is very unpopular and now he wants to give over 18 million illegals a "pathway to citizenship". Obama was a Constitutional Law Professor and he has to ask the Justice Dept. about the new Arizona law? Obama is selling out this country for Latino votes. Brush up on your Spanish Amigos.