Former Secretary of State Hillary Clinton's lead over Republican presidential nominee Donald Trump has fallen over the past week, according to a new poll released Friday.

According to the Reuters/Ipsos tracking poll, Clinton leads Trump by a 5-point margin, topping him with 41 percent support to his 36 percent. Earlier in the week, Clinton held a 12-point advantage in the same poll (44.8-32.8 percent).

Eight percent of respondents refused to say who they support, while another five percent said that they will not vote. Eight percent also plan to support another candidate.

The poll comes amid a renewed effort by Trump to court African-American voters, which he set out to do in the days following a shake-up in his campaign hierarchy, which saw campaign chairman Paul Manafort resign in favor of Stephen Bannon as campaign chief executive and Kellyanne Conway as campaign manager.

However, Trump has run into problems with some base supporters lately after softening his rhetoric and stance on immigration, a key issue that helped him win the GOP primary.

The poll, which was taken from Aug. 23-25, is a daily tracking poll that surveyed 1,154 likely voters and has a credibility interval of 3 points.

Overall, according to the latest RealClearPolitics average, Clinton holds a 6-point lead over the real estate mogul (47.7-41.7 percent).