The House Armed Services Committee will look into how senior leaders mishandled the defense secretary's hospitalization earlier this month.
The Senate voted down a resolution to withdraw U.S. troops from Syria amid dozens of attacks from Iran-backed proxies in the war-torn country.
The number of veterans discovered to be affected by the mistakes has grown in recent months.
The proposal would also levy a $1,000 fine for individuals who talk publicly about their clearance status.
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