Both candidates may still be claiming victory after Monday's debate, but the polls show that Hillary Clinton is the one gaining momentum.
Data experts say the Democratic candidate appears to have gained a point or two in a race that had basically been a toss-up. That gain may be temporary, so both candidates are still pushing hard for every vote.
"Either Donald Trump or I will be the president of the United States and so people have to look carefully in making their decision about who to vote for because it will either be him or me and I am going to do everything I can to make sure it's me," Clinton said.
With the next debate only 10 days away, Trump is reportedly resisting attempts to change his approach, even as top Republicans call for more serious preparation.
Instead, he's pressing ahead with his aggressive strategy and focusing on winning over new voters by keeping up his attacks on Clinton's record.
"She (Hillary Clinton) and her financial backers will say anything, do anything, lie about anything to keep their grip on power, to keep their control over this country," Trump told supporters at a rally in New Hampshire.
Trump may also go after how Clinton treated the women that her husband, former President Bill Clinton, had affairs with.
The news comes after Clinton brought up Trump's treatment of a former Miss Universe in the first debate.
"He called this woman 'Miss Piggy.' Then he called her 'Miss Housekeeping' because she was Latina. Donald, she has a name," Clinton said.
Trump said he held his tongue in the debate to avoid embarrassing Clinton; now he's seeking to tie her to her husband's scandal-marked presidency.
"The American people have had it with years and decades of Clinton corruption and scandals, corruption and scandals. And impeachment for lying, remember that? Impeach," Trump told supporters.
With this presidential race as controversial as ever, it remains tight.
Two more presidential debates are ahead and in the end, the battleground states and voter turnout will likely determine who wins the White House.