PHILADELPHIA -

Hillary Clinton's campaign is aggressively outworking Donald Trump in battleground Pennsylvania, a state the billionaire businessman can scarcely afford to lose and still hope to become president.

Despite polling well in Pennsylvania throughout the summer, Clinton's team is nevertheless bearing down in a state her party has carried in six straight elections.

They are ratcheting up advertising and dispatching their top supporters to Pennsylvania, from Bill Clinton to Joe Biden to last week's visit from President Barack Obama.

At a minimum, an energized Pennsylvania campaign is a balm for Clinton as she weathers a dip in national polls and in the swing states of Florida and Ohio.

But with roughly seven weeks until Election Day, Trump's scattershot approach to the state puts his White House prospects in jeopardy.