Substantial = broad = not narrow

Substantial = broad = not narrow ?

Context:

CARACAS, Venezuela, Aug. 16 -- President Hugo Chavez was declared the winner of a national recall referendum by a substantial margin on Monday, and said he had won a fresh mandate for the highly centralized, populist style of government that has stirred fierce opposition at home and irritated the Bush administration.

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Return = answer?

Context:
About 58 percent of the voters in the Sunday ballot said "no" to a recall of Chavez, while 42 percent said "yes," according to nearly complete returns from the national elections council. Officials said that at least 8.5 million of the country's 14 million registered voters participated in the referendum.