RPT-U.S. fund managers betting Trump fails to rewrite Obamacare

By David Randall NEW YORK, Jan 24 (Reuters) - Some prominent U.S. fund managers are betting that former President Barack Obama's signature healthcare law will not undergo the widespread changes that President Donald Trump promised on the campaign trail. Portfolio managers from Fidelity, Gamco, Thornburg and other large firms say they see the broad outlines of the Affordable Care Act - commonly known as Obamacare - remaining intact despite Trump's signing of an executive order on Friday,