Phil Brach spent the weekend putting huge sheets of plywood up over the massive glass windows of the store where he works, Rodman's Food and Drug in Washington, D.C., in preparation for Election Day.

"We'll probably go up two or three boards high," Brach says.

Across the country, there are growing concerns that the bitterness and animosity over the presidential election will not end when the polls close Tuesday night. From coast to coast, cities are preparing for possible protests, civil unrest and violence, regardless of the election's outcome.

Brach is working alongside his boss, Nolan Rodman, the third generation of his family to run the store that his grandfather first opened in 1955 as a pharmacy. It now includes a café, produce, beer, wine and food items from around the world.

On May 31, Nolan says he was caught unprepared when rioters broke in and looted his business during the height of the protests over the police killing of George Floyd in Minneapolis that sparked protests nationwide.

"They threw a chair through our window, there was chaos happening everywhere," Nolan says. "I was very scared that night. It was pretty horrifying."

After Rodman's was ransacked, Nolan says he couldn't sleep for a week.

This time around they have a plan

Nolan says he went to the store the night of the looting along with a police officer who advised him to leave. Security cameras caught mostly young men going into the pharmacy and the beer and wine section of the store. He and his father Roy Rodman even stayed in the store a few nights.

Roy says this time around they have a plan.

"We put some film on these windows so that they're not easily broken, if they're smashed, they'll stay in place. And we're hoping that no one can break into the store, at least not easily," Roy says. Nolan adds, "The film makes the glass shatterproof so it doesn't just explode upon contact."

While the nation's capital city is certain to be a focal point of post-election demonstrations, other cities are bracing for possible chaos too.

The National Retail Federation has held training webinars for members on crisis prevention and de-escalating conflict and hired security consultants to help store owners prepare.

Many storefront windows along Chicago's Michigan Avenue are already boarded up – as some retailers there have been looted this summer not just once, but twice.

"Coming off of the summer, seeing the looting that occurred, there's a lot of anxiety," says Elliott Richardson who heads the Small Business Advocacy Council in Chicago. "There's a lot of nervousness about what might happen now, what might happen during the election."

Richardson says it's not just the high-end retailers on the Magnificent Mile downtown that are at risk, but also the mom & pop shops on the South and the West side of Chicago who are hanging on by a thread right now because of the pandemic.

Channel emotions into peaceful and productive expressions

"They cannot afford to be looted. They cannot afford destruction, because if that happens, they very well may close and not reopen," Richardson says.

Chicago Mayor Lori Lightfoot says the city has been planning and preparing for potential election-related protests and civil unrest for months.

"We all know that emotions will be high because they already are," says the mayor, "and I urge you to channel those emotions into peaceful and productive expressions."

Like other cities, Chicago has been running tabletop exercises and gaming out how, when and where violence might erupt. Days off for police officers are canceled and the city will flood certain areas with a highly visible police presence to deter violence. The city will also be using snow plows, dump trucks and other heavy vehicles to certain block streets and expressway exit ramps to keep demonstrators away.

Superintendent David Brown says police will respect people's rights to peacefully protest and will work first and foremost to de-escalate any confrontations, but he hastens to add that his officers will take swift action against anyone intent on spreading chaos.

"The message is, don't loot in Chicago. If you do loot, you will be held accountable. If you escape, we will find you and bring you to justice," says Brown with a seriousness in his voice.

In Beverly Hills, Calif. tensions felt high already this weekend.

Workers were busy boarding up store windows while supporters of President Trump held a "freedom rally" that was briefly disrupted by counterprotesters.

Police are planning to shut down Rodeo Drive Tuesday and Wednesday, but one small business owner who is not boarding up is Steve White, a 47-year old Army veteran who attended the rally wearing fatigues and a Kevlar vest.

"I've been buying weapons and guns ever since the first riots hit, so I'm definitely prepared for it," White says. He owns a business on Wilshire Avenue, "I'm worried about it but I'm just going to camp out there every night and defend my own business."

Groups on both sides of the political spectrum are planning election night demonstrations and the very real possibility that the outcome could be unsettled for days or weeks after Election Day could escalate tensions.

Though Indiana University political science professor Ore Koren, who studies political unrest globally, says mass organized political violence is not a part of the American psyche.

"We just don't do this in this country. We have lone wolves. We can have some of rioting," he says "but in terms of actual massive violence, this is not something we have done before."

That said, 2020 is already a year of political tension and unrest unlike anything seen in the country since the 1960s and the only certainty seems to be how difficult it is to predict what may happen next.

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