The president will announce the funding at event in western Pennsylvania.
Police say a man has been taken into custody in connection with the unattended backpacks.
The attorney general has called for more funding for active-shooter training for police.
Noah Kai Newkirk has been barred from the Supreme Court grounds for a year.
Dems look to ratchet up pressure on House GOP to take up immigration reform this year.
Sink was defeated in a special election earlier this year, but Dems wanted her to try again.
A reporter heard the gunfire at a military airport in Kramatorsk.
The White House is scheduled to hold a moment of silence for the victims later Tuesday.
The attorney general said the funding would pay for police training around the country.
China said the trip violates promises the United States has made to Beijing.