At the end of August, Democratic presidential nominee Hillary Clinton's chances of winning the White House were estimated at almost 80 percent. Her Republican rival, Donald Trump, had only a 20 percent chance, according to election forecasting website 538.com.
Those odds have changed dramatically, according to new estimates that show Clinton's chances of winning the White House dropping by more than 20 percent.
538 currently has Clinton's chance of winning the White House at 56 percent compared to Trump's 44 percent. The separation between the two candidates is the closest it has been since July 30 when the two were virtually tied. Less than a month later, Clinton's chances of winning was at 88 percent while Trump was only 12 percent.
The forecast has Clinton winning 46 percent of the popular vote with Trump taking 45 percent and Libertarian Gary Johnson at 8 percent.
The separation is more apparent, however, in the all-important Electoral College. Clinton is forecast to win 281 electoral votes to Trump's 256 and Johnson's 0.3. A candidate needs at least 270 electoral votes to clinch the White House.
Who is leading in the battleground states?
The narrowing of the presidential race is a product of Trump's improving numbers in key states.
538 now has Trump winning Ohio, North Carolina, Nevada, Georgia and Arizona.
Among battleground states, Clinton's strongest numbers come from Pennsylvania, Minnesota and New Mexico.
Trump holds a small margin of victory in Florida, where he's ahead by .8 percent. The likelihood of Florida being the tipping point for a winning candidate is at 17 percent, the largest of any state.