Hillary Clinton is spending nearly $3 million more than Donald Trump on advertising in crucial battleground states, as she continues to flood the airwaves with ads that cast her Republican opponent as dangerous and unfit to be commander in chief.

The Democratic presidential nominee will spend a combined $9.8 million on ads in nine swing states this week, while Trump's campaign plans to spend $6.9 million during the same period, according to NBC News.

In Ohio, a state of strategic importance to Trump's path to the White House, the former secretary of state plans to outspend him on advertising by $1.1 million this week. In Florida, the Clinton campaign will spend $3.1 million on ads while Trump is planning to drop $670,742.



Meanwhile, Trump is spending far more on paid advertising in Colorado, Michigan, New Hampshire and Virginia. Clinton carries a 5-point lead or greater in all four states, according to RealClearPolitics' state-level polling averages.

Only recently did Trump begin to close the ad-spending gap between himself and Clinton after spending months relying on free media to share his message with voters. The Republican presidential hopeful still lags far behind Clinton when it comes to overall spending so far this cycle — $81 million-$13 million.

When outside support groups are taken into account, Clinton and her allies are outspending Trump and his $132 million-$28.7 million.