I doubt provisional ballots alone will change the results of an election, except, there have been an increasingly close elections wins.
August 21, 2017
A Durham County grand jury (click here) on Monday indicted a former Durham County elections worker on charges related to the mishandling of provisional ballot results during the March 2016 primary election.
The grand jury returned indictments against Richard Robert Rawling, 59, of Cary, on counts of obstruction of justice, a felony, and failure to discharge a duty of his office, a misdemeanor.
Investigators from the then-N.C. State Board of Elections (now called the Bipartisan State Board of Elections & Ethics Enforcement) found that irregularities resulting from Rawling's actions were not sufficient in number to affect any contest outcomes. It also found no evidence that Rawling altered ballot counts to support a particular political party or candidate....