Advocates say New York state is a national leader in helping unaccompanied migrant children fleeing Central America to stay in the United States. But they told state Assembly lawmakers Tuesday that more funding is needed for the services that would give the youths a normal life. Across the country, immigration officials say about 90,000 youths could face detention and deportation. An estimated 3,000 or more are in New York state and up to 7,000 more are expected this year.