"With Hurricane Florence on its way, we determined that this is the safest decision", wrote Michael Glassner of the Trump Campaign in a statement.
Gov. Larry Hogan made the announcement at a news conference Monday.
Given the potential impact, officials say now is the time to get supplies and a way to receive weather alerts.
"This storm is going to be a direct hit on our coast", said Jeff Byard, associate administrator for response and recovery at the Federal Emergency Management Agency. Cooper emphasized that the coast is not the only part of the state that needs to be on alert.
Basically, Hurricane Florence is coming in hot. He said the city's emergency operations center will be partially activated Wednesday and fully activated on Thursday.
Gov. Henry McMaster has ordered mandatory evacuations for all coastal SC counties starting at noon on Tuesday ahead of Hurricane Florence's projected landfall. Even before the evacuation order, Dare County emergency officials warned that rough seas and strong rip currents already were creating risky conditions. Unsafe winds could down trees & cause power outages ...
In fact, forecasts are predicting that Florence could be "Harvey-like". Which among other things, means people need to start preparing now.
"It's not just the coast", Graham said.
The NHC warned on Sunday night: "There is an increasing risk of two life-threatening impacts from Florence: storm surge at the coast and freshwater flooding from a prolonged heavy rainfall event inland".
At 9/11 memorial Trump hails 'the moment when America fought back'
In all, four planes were hijacked by Al-Qaeda militants who used them to topple the trade center's twin towers and hit the Pentagon.
This storm is lined up behind Florence in the Atlantic.
Henry McMaster (R) on Monday ordered a mandatory evacuation of the state's coastline ahead of Hurricane Florence's expected arrival on Thursday.
Preparations intensified up and down the densely populated coast. Most other reports are using the word "catastrophic", in keeping with how the National Hurricane Center describes a Category 4 hurricane: "catastrophic damage will occur".
Cooper's emergency declaration makes it possible to waive the state's transportation rules so North Carolina farmers can harvest and transport their crops to market faster. "So making sure you have a flashlight, a radio - battery-powered or hand crank - first aid kit, and of course your emergency contacts", said Maribel Street, Emergency Communications Center.
Hurricane Florence was traveling over warm Atlantic waters and gaining energy as it moved 625 miles southeast of Bermuda Monday.
"I think this is very Harvey-esque", said University of Miami hurricane expert Brian McNoldy.
Hazel also wreaked havoc on Southern Ontario, dumping over 200 milimetres of rain on Toronto alone, while packing winds over 100 km/h.