Former Secretary of State Hillary Clinton and Sen. Bernie Sanders’ miniscule difference of 0.2 percent Monday night is the narrowest margin between two top Democratic presidential candidates in the Iowa caucus’ 44-year history. Before Monday night, the Democrats haven’t seen such a narrow Hawkeye State race since 1988, when Dick Gephardt beat politician Paul Simon by 4.6 percent.
Overall, the tightest Iowa caucus race was in 2012 between former Massachusetts governor Mitt Romney and former senator Rick Santorum (R-PA), with Santorum winning the GOP dead heat by a mere 34 votes after more than 121,000 republicans cast their ballots.
RELATED: Why Clinton’s apparent Iowa win feels more like a loss
Former presidents George H.W. Bush and Ronald Reagan followed with the third narrowest difference, with Bush winning by 2.1 percent in the 1980 Republican Iowa caucus. The fourth smallest difference in the Iowa caucus was the 3 percent difference between Republican nominees former Sen. Bob Dole and Pat Buchanan in the 1996. In comparison, Republicans Sen. Ted Cruz and Donald Trump’s difference of 3.34 percent in the 2016 Iowa caucus Monday night was the fifth closest race in the caucus history, as well.
While Republicans have typically seen more narrow races in the Iowa caucuses, Democrats have had the top five largest differences in their Iowa caucus races.









