Deleted Tweet from Robert "Bob" Casey Jr., D-Pa.
Deleted Tweet from Senator Bob Casey
@POTUS I joined @POTUS at a site that was once home to a steel mill that employed thousands. Now, it's a hub for advanced manufacturing, focused on robotics, A.I. and other 21st century innovations. The rest of the Nation could learn a thing or two from Pittsburgh. https://t.co/E8ZwR8AAo2
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