FORT WASHINGTON, Maryland -- Sometimes, even the pressure of an impending election can be put on hold when Mother Nature has her way. High winds in the Washington, D.C. area have reaked havoc on last-minute campaigning ahead of the region's primaries on Tuesday, causing cancellations and delays for candidates. At a Hillary Clinton event in Manassas earlier this afternoon, supporters braved heavy gusts and watched more than a few large tree branches come down across the street.

In Fort Washington, just across the Potomac River from Washington, Donna Edwards, a congressional candidate running against incumbent Democratic Rep. Al Wynn, had to cancel an appearance at a local African American festival when the community center in which it was held lost power three times.

Clinton, planning to make stops in southern Virginia before reaching Maryland voters tonight, had to suspend an event planned for Roanoke this afternoon, citing inclement weather. She will attend a rally in Bowie, Maryland later tonight as planned, while husband Bill Clinton will hit Roanoke tomorrow.

Barack Obama campaigned in Alexandria today, on the Virginia side of the Potomac, before heading south to Virginia Beach. He will try the same Roanoke-to-Maryland route Clinton tried today, with a stop in Roanoke planned before a rally tomorrow night in College Park.