MIAMI HERALD/ President Obama is criticizing Cuba's use of ``a clenched fist'' against ``those who dare to give voice to the desires of their fellow Cubans and hinted efforts to improve U.S. relations with the Raúl Castro-led government may be side-tracked after the death of dissident prisoner Orlando Zapata and the harassment by Cuban security forces of the week-long Havana marches by female relatives of jailed dissidents, the so-called Ladies in White. Meanwhile, today, singer Gloria Estefan is leading a march on Little Havana's Calle Ocho in support of the Ladies in White.
