Republican presidential nominee Donald Trump speaks to supporters at a rally in the BB&T center, Ft Lauderdale, Florida, August 10, 2016.. Photo by Gary I Rothstein/UPI | License Photo

Democratic U.S presidential nominee Hillary Clinton waves to the crowd after speaking at the Futuramic Tool & Engineering plant in Warren, Michigan on August 11, 2016. Photo by Rebecca Cook/UPI | License Photo

WASHINGTON, Aug. 18 (UPI) -- The UPI/CVoter daily presidential tracking poll released Thursday shows Hillary Clinton maintaining her steady lead over Donald Trump.

The online poll shows Clinton with 50.84 percent support to Trump's 44.28 percent


The most recent data reflect a slight increase for both candidates from data collected a day earlier. Clinton gained 0.17 percent to Trump's 0.09 percent increase.

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 Aug. 9-16, when 1,473 individuals were surveyed. Of them, 1,069 identified themselves as likely voters.