VATICAN CITY The cardinals who enter the papal conclave on Tuesday will troop into the Sistine Chapel in single file, but beneath the orderly display, they are split into competing lineups and power blocs that will determine which man among them emerges as pope.
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Cardinal Sean Patrick O'Malley of Boston, who is considered one of the leading American papal candidates, arrives at the church of Santa Maria alla Vittoria in Rome for Mass on Sunday.
