WASHINGTON — The United States is preparing to circulate a resolution at the U.N. Security Council on Monday that would establish a new framework for sanctioning Haiti’s gang leaders, and is not taking international intervention off the table as the country spirals into lawlessness, a senior State Department official told McClatchy. Assistant Secretary of State for Western Hemisphere Affairs Brian A. Nichols said in an interview that gang leaders fueling Haiti’s worst security crisis in decades “are in the crosshairs, and their actions to destabilize Haiti will be met with international travel…