特朗普计划强势回归竞选活动(2)

The damage could be even greater this year.

Presidents with an approval rating below 50%-Trump's currently sits at around 43%- fare much worse than their peers, according to data from Gallup.

But the Republican Party believes Trump can break the pattern.

There's no one better to turn out our Republican base than President Trump, says Cassie Smedile, a spokeswoman for the Republican National Committee.

DEPLOYING A COMMANDER IN CHIEF to the campaign trail is not exactly groundbreaking.

But certain rules of decorum have traditionally applied, experts say.

Earlier Presidents have thought that is just part of presidential dignity, says Michael Beschloss, a presidential historian.

You don't get into the mud in a state or a district election.

One notable exception was former President Richard Nixon.

Hoping to boost the number of GOP seats in the Democrat-held Congress,