Pickaxe is a heavily fortified facility deep underground that would be difficult to penetrate even with powerful 'bunker buster' bombs.

Trump's speech announcement elicited fears from Democrats and voting rights advocates that he is planning yet another play for control over voting in November.

The suspension was ordered after an ICE officer shot and killed a Colombian driver Monday in Maine and a week after another officer shot and killed a motorist in Houston.

The White House defended President Trump's dismissal of the bipartisan U.S. Elections Assistance Commission's remaining members as enhancing election security. Critics called it a dangerous partisan move.