Despite coming into the 2016 Republican presidential election with a huge advantage, Jeb Bush's net favorability rate has significantly decreased, making him the most unpopular GOP contender in the Republican field.

The former Florida governor, who was once perceived to be an early front-runner, boasted a net favorability of +27 in July, reports Politico. His family's legacy also helped him earn strong name recognition early on in the race with 81 percent of Republican voters.

However, a new Gallup poll released Friday shows that his favorability has dropped 28 points since July, putting him at a new low of -1 percent. Meanwhile, his name recognition rating has increased to 89 percent, making him the second most known GOP candidate in the race. (Donald Trump came in first place with a 94 percent rating.) This means that the more Bush is recognized, the least voters like him.

According to the poll, which surveyed Republicans and Republican-leaning independents between Dec. 18 and Jan. 5, 45 percent said they had an unfavorable opinion of Bush. In comparison, 54 percent of respondents said they had a favorable opinion of Bush in July.

Despite his campaign's effort to improve his image, Bush suffered the biggest favorability decline with men as his rating with the group dropped by 39 points. Meanwhile, his women's favorability rating has declined by 13 points.

On the other hand, 61 percent of those surveyed said they had a favorable opinion of Texas Sen. Ted Cruz, putting him at the top of the list with a +45 net favorable rating.

Florida Sen. Marco Rubio came in second place with a +35 net favorable rating after 55 percent of people said they had a favorable view of him. Retired neurosurgeon Ben Carson came in fourth place with a +40 net favorable rating, while Donald Trump had a +24 favorability rating, according to the poll.