Donald Trump is starting to noticeably cut into Hillary Clinton's once-gigantic lead in the polls

Donald Trump is gaining ground on Hillary Clinton nationally.

The Republican nominee, who faced a mid-August deficit of nearly 8 points in the RealClearPolitics head-to-head polling average against Clinton, has cut that lead nearly in half.

Clinton on Thursday led Trump by 4.6 points in the head-to-head matchup, while her lead was down to 3.6 points in the polling average that includes Libertarian nominee Gary Johnson and Green Party nominee Jill Stein.

That came as a number of recent polls showed him increasingly close to the Democratic nominee. Wednesday polls from Fox News and Reuters showed Trump down 2 points in a four-way matchup against Clinton, Johnson, and Stein, while a poll from Rasmussen, a right-leaning polling outlet, showed him with a 1 points lead.

Click through images of Donald Trump's meeting with Mexico's President Pena Nieto:

Renowned statistician Nate Silver's "Polls-plus" forecast on FiveThirtyEight Thursday showed Trump with a 30% chance of winning the election. Silver's projections as recently as early August showed Clinton with a more-than 90% chance of winning in November.

Trump seemed to acknowledge the push in a Thursday tweet:

Still, Clinton has come out ahead in virtually every poll since the end of July, with just two national polls listed on RealClearPolitics showing Trump ahead in either a head-to-head or four-way matchup. A whopping 66 polls show Clinton on top.