MEXICO CITY — Mexico’s Congress approved Wednesday most of the tariff increases proposed by the government on more than 1,400 products imported from China and other countries that do not have free trade agreements with Mexico.

The Senate passed the measure Wednesday evening, following the lower chamber, which had approved the increases before dawn. The governing Morena party of President Claudia Sheinbaum, who said the tariffs were necessary to spur domestic production, controls both chambers. The Senate passed the legislation with 76 votes in favor, five against and 35 abstentions.

Analysts say the real motivation is ongoing negotiations with Washington, Mexico’s most important trading partner. Sheinbaum has been trying to find relief from remaining tariffs imposed on Mexican imports by

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