U.S. House Democrats prepare to march onto the House floor in WashingtonBy means of Thomas Ferraro and Tim Reid WASHINGTON (Reuters) – Congressional negotiations to finish a U.S. fiscal crisis gripping Washington and spooking monetary markets hung by using a thread on Saturday after bipartisan talks broke down within the Home of Representatives and shifted to Senate leaders. Senate Majority Chief Harry Reid, a Democrat, held an preliminary session with Senate Republican leader Mitch McConnell. However uncertainty remained about their skill to reach an settlement fast to end a partial govt shutdown and raise the nation's borrowing authority. …