WASHINGTON (AP) — Viewers of the latest Republican presidential debate didn't get a straight story from the candidates on U.S. taxes vs. the world, the state of the health insurance marketplace under "Obamacare" or what might happen if that law is taken away. —In his zeal to condemn the Obama administration's immigration record, Ted Cruz once again vastly overstated deportations under the previous two presidents. Aetna, the third-largest insurer, said it has been struggling with customers who sign up for coverage outside the health law's annual enrollment window and then use a lot of care. Some industry analysts say insurers are struggling to attract enough healthy patients, and it's too easy for customers to manipulate the system by doing things like signing up for coverage, using health care, and then stopping premium payments. Rubio is right that the state's credit rating has been downgraded nine times since Christie took office, a reflection of concern by the major rating agencies about New Jersey's fiscal health and pension system. President Barack Obama said exactly the opposite in June, when the White House reaffirmed its opposition to paying ransom to terrorist groups that hold American citizens hostage. Though the new White House policy precludes ransom payments by the U.S.