After a fairly solid lead during the early days of Vice President Kamala Harris' entry into the race, the equation has become more even now, and voter sentiment in key swing states, therefore, assumes importance. A recent poll that concluded on Tuesday suggests Republican candidate Donald Trump now leads in the key swing state of Pennsylvania, which goes by the moniker 'Keystone State.'

What Happened: Trump was ahead of Harris by a two percentage point margin as he received 48% support of voters in the key swing state of Pennsylvania compared to 46% for the latter, a survey by InsiderAdvantage showed. About 2% supported others and 2% of the voters surveyed were undecided.

The only sore spot is that the lead is still fragile, given it was within the survey's margin of error of 3.46%.

The pollster said the former president was gaining momentum in the state, with his support among independents, seniors and African voters either increasing or holding steady. On the other hand, Harris' support among African American males has deteriorated a bit.

"This race continues to remain very close with turnout and enthusiasm remaining important," the pollster said, adding that the Democrats currently enjoy a slight advantage with regard to enthusiasm at this point, although the gap has narrowed.

Another sign of the shifting momentum is the narrowing gap in voter sentiment toward the Senate candidates. Sen. Bob Casey Jr. (D-Pa.) is now ahead of his Republican rival Dave McCormick by only two points, with the equation at 47%-45%, the pollster said.

Why It's Important: The poll results come with just 25 days away from the all-important Nov. 5 election, which will seal the fate of the candidates. Pennsylvania has 19 electoral college votes and this state went to President Joe Biden in the 2020 election by a little over 1% margin.

An Emerson College poll conducted from Sept. 27-28 showed both Trump and Harris tied, with 48% support each.