WASHINGTON, Oct. 3 (UPI) -- The UPI/CVoter daily presidential tracking poll released Monday shows Donald Trump leading former Secretary of State Hillary Clinton by 2.5 percentage points, a slight increase from the beginning of the weekend.

The online poll shows Trump carrying 49.38 percent of voters to Clinton's 46.89 percent in the daily tracking poll, continuing the back-and-forth swapping of a slight lead since Clinton lost a sizeable lead after the Democratic National Convention in late July. "Others," defined in the poll as respondents who decline to pick either Clinton or Trump, made up the remaining 3.73 percent of voters.


Clinton gained a bump in her poll numbers after the Democratic convention, reaching a high of a 7.3-point lead on July 31. She largely maintained a lead until September when Trump leaped ahead of her. Trump led the poll for 11 days after regaining the lead on Sept. 6, and the candidates have since taken turns holding slim leads in the daily poll.

Clinton was expected to put some space between her and Trump in the polls after what many considered a strong performance in the first presidential debate of the general election, and Trump's highly criticized remarks about former Miss Universe Alicia Machado, but that has not happened.

The UPI/CVoter online tracking poll surveys about 200 people each day, leading to a sample size of roughly 1,400 people during any seven-day span.

Because the poll is conducted online and individuals self-select to participate, a margin of error cannot be calculated. The poll has a credibility interval of 3 percentage points. This seven-day span includes data collected from Sept. 26 to Oct. 2, when 1,836 registered voters were surveyed. Of them, 1,285 identified themselves as likely voters.