President Trump tweeted on Tuesday that he will nominate acting Homeland Security Secretary Chad Wolf to be the permanent head of the agency.

Why it matters: It's been more than 500 days since a Senate-confirmed secretary led the Department of Homeland Security — a record for any administration. Earlier this month, the Government Accountability Office found that Wolf and his acting deputy Ken Cuccinelli are ineligible to serve in their position because they did not follow federal law governing how certain leadership vacancies can be filled.

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