By The Associated Press Most people in the United States think illegal immigration is a serious problem. A solid majority oppose making it easier for illegal immigrants to become legal workers or citizens. Some findings in recent polling: _ Some 59 percent say they oppose allowing illegal immigrants to apply for legal, temporary-worker status, an NBC News-Wall Street Journal poll found. _ More than six in 10, 62 percent, say they oppose making it easier for illegal immigrants to become citizens, according to a Quinnipiac University poll. Nine in 10 in that poll say they consider immigration to be a...