How did economic nationalism affect world economies?

Explanation:

The rise in economic nationalism undermines the tradition of economic liberalism (globalism) and discourages economic and political cooperation between countries. ... Countries benefit with cooperation between countries to mutual benefit, becoming too nationalistic at the expense of its partners is counterproductive.

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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the answer would be a i think?