WASHINGTON — The Supreme Court appeared sharply divided Wednesday over whether federal law should allow doctors to perform emergency abortions in states with near-total bans on the procedure, in a case that could determine access to abortion in emergency rooms across the country. The lively, two-hour argument focused on a clash between Idaho, whose law limits access to abortion unless the life of the pregnant woman is in danger, and federal law. Questioning by the justices suggested a divide alo