Democrats see new chances to flip red states — but a $400M GOP spending advantage could derail their plans

With just over three weeks to go until Election Day , more and more red states and congressional districts appear in reach for the Democrats, as they work to win back House and Senate majorities from the Republicans in the midterms.

But a massive Republican spending advantage threatens to complicate those ambitions.

Republican campaigns, committees and aligned groups have outspent their Democratic counterparts by $400 million so far this election cycle, according to AdImpact, a leading political advertising tracking firm.

The disparity is forcing Democrats to make difficult decisions about where to invest and how much to spend as the party tries to expand the electoral map .

"We are being outspent by the Republicans.

That's just a fact," Lauren French, communications director at the Senate Majority PAC, told Fox News Digital.

"In many of these states, they have really transactionalized elections, so they have monopoly money to play with, whereas we are working with real resources." DEMOCRATS THINK A BLUE WAVE IS FORMER - HERE ARE THREE FACTORS THAT COULD STOP IT The latest Fox News Power Rankings shifted GOP-dominated South Carolina from Solid to Likely Republican.

The Senate showdown in reliably Republican Kansas is Lean Republican, while the races in red-leaning Alaska, Iowa, Ohio and Texas are rated toss-ups.

"Senate Majority PAC has resources to compete, and we are very happy that we're able to be in 9 battleground states," French said.

The super PAC is the leading outside group supporting Democratic Senate candidates and incumbents and is aligned with longtime Democratic leader Sen.

Chuck Schumer ." French highlighted record-setting fundraising the past three months, but added "of course, more recess resources would be helpful." With the latest polls from Fox News and other organizations showing Democrats increasingly competitive across the Senate map, the party is pleading for more money.

"Last month a pro-Trump PAC reserved $10 million in New Hampshire advertising, and we’re being outspent 3-to-1," reads a fundraising pitch to supporters by Rep.

Chris Pappas, the Democratic Senate nominee in swing state New Hampshire.

WHO'S UP AND WHO'S DOWN IN THE LATEST FOX NEWS MIDTERM POWER RANKINGS Senate Majority PAC is rushing some of its record fundraising into the newly competitive battlegrounds.