A top Republican lawmaker in the House of Representatives is backtracking on a proposal that would have given Secretary of State Marco Rubio the power to revoke American citizens’ passports if he decides they have provided “material support” to terrorists.

The proposal from Rep. Brian Mast, R-Fla., sparked a backlash from civil society groups after he introduced it as part of a larger State Department reorganization bill last week.

On Sunday, Mast introduced a manager’s amendment that would strip the provision from the bill he........

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