The super PAC supporting Hillary Clinton's campaign is reducing its presence on television in September, a fresh sign of the confidence Democrats are feeling about the presidential race and a signal they may get creative in the run-up to the November election.

Priorities USA confirmed this week that it intends to pull down television ads in two battlegrounds considered crucial to a Clinton victory this fall: Colorado and Pennsylvania; the Democratic group is already dark in a third swing state, Virginia.

Trump's polling rut has Democrats examining typically red states like Arizona and Georgia as possible targets. But it's only mid August.

The super PAC is planning to go dark in Colorado and Pennsylvania beginning Sept. 3, returning to the airwaves there and in Virginia on Sept. 20, with advertising scheduled to run through Election Day.

The moves are a product of Clinton's significant lead over Republican nominee Donald Trump in those three states, and nationally, that have developed since the conclusion of the nominating conventions in late July.

In perennial battlegrounds Colorado and Virginia, Clinton has opened double-digit leads in some polls.

The same is true in Pennsylvania, the blue state Trump is counting on flipping to make good on his prediction that he would expand the map for the Republicans.

It's natural for campaigns and affiliated groups to shift advertising resources according to conditions on the ground.

But deciding three weeks in advance to pull down advertising in key states — based on the public and private polling that exists today — is a bold move by Priorities USA that reveals just how it confident the group is about Clinton's position.

"We've always said that we are constantly assessing how to spend resources as efficiently as we can. At moment there's simply not as much of a need to advertise in those three states," Priorities USA spokesman Justin Barasky said in a telephone interview with the Washington Examiner. "We still expect it to be a very competitive race."

In the average of recent polls, Clinton has jumped out to a lead over Trump of 45.8 percent to 34.8 percent in Colorado; 49.2 percent to 40 percent in Pennsylvania; and 47.5 percent to 37.5 percent in Virginia. Her lead nationally was sitting at 47.7 percent to 41 percent as of Tuesday.

Clinton is a flawed candidate with a trunk-load of baggage that could be problematic down the stretch of this race and allow Trump to climb back into contention, despite his own mess of problems and the fact that he is even more unpopular than she is.

Conversely, early and absentee voting begins next month when ballots are mailed out in North Carolina and a host of other battlegrounds where Clinton leads. And, Trump showing no signs of altering an approach to campaigning that has contributed to his slide.

That assessment of Trump and the calendar are factors in Priorities USA's decision to halt television advertising in Colorado, Pennsylvania and Virginia and direct resources into other activities and other states.

Barasky was cagey about the super PAC's plans for Sept. 3-20, which includes the immediate post-Labor Day period when voters traditionally begin paying attention to the presidential contest.

He indicated that Priorities USA would move resources for advertising that targets persuadable voters to other states, while still spending in Colorado, Pennsylvania and Virginia on field operations aimed at turning out core Democratic voting blocs.

"I think it's months of assessing what's happening on ground in the states — months of polling," Barasky said, in explanation of the group's latest moves. "Certainly it's not a decision that's made lightly."

On the Democratic side, Priorities USA is Clinton's designated super PAC. The group has raised and spent tens of millions of dollars on television and digital advertising. The Clinton campaign has done the same.

The Trump campaign has not invested any money in television advertising this summer, and outside groups supportive of the New York businessman haven't been able to muster anywhere near the funds available to Priorities USA.

The super PAC's decision to make the call three weeks ahead of time to yank television advertising in three crucial states was interpreted by Republicans as confidence by Democrats in Clinton's standing. That's due partly to the fact that Priorities USA clearly isn't hurting for cash and it's not as though they're having to scramble and adjust strategy to protect Clinton from a Trump surge.

Interestingly, Republicans aren't really arguing that Democrats shouldn't be confident, at least not those Republicans outside of Trump's orbit of loyal followers.

"There is also something to be said about pulling ad buys while everyone is writing your opponent's epitaph. One could question why money is moving around under different circumstances but during this period it projects confidence," said a Republican operative, who requested anonymity in order to speak candidly.

Still, they say it's nearly impossible to know if Clinton's lead is calcifying and becoming immune to events.

That's partly because of the potential for scandal to knock down Clinton, whether related to her family's charitable foundation or her use of a private email server during her tenure at the State Department. "She is too flawed to ever run away and hide; she is the kind of candidate who can be beaten until the last hour," GOP strategist Brad Todd said.

The other unknown is whether voters becoming more engaged after Labor Day alters the competition. The upcoming presidential debates also are traditional opportunities for trailing candidates to climb back into the race.

"I don't know why anyone would want to take their foot off the gas this early," said Bill Whalen, a political analyst at the Hoover Institution, a conservative think tank northern California. "Things can change and things can change quickly."