President Obama on Tuesday called for a "prudent" response to Ebola in the United States, a veiled rebuke of New Jersey Gov. Chris Christie (R), who has ridiculed the federal government's handling of the issue."We don't want to discourage our health care workers from going to the front line and dealing with this in an effective way," Obama said, adding that his administration favors an approach that is "sensible, based in science, and tailored to the unique circumstances of each health worker.""We don't just react based on our fears," he said.