A new poll shows Hillary Clinton, the Democratic Party favorite for the upcoming presidential elections, continues to lead among voters. However, many of the heavyweight candidates have also improved among voters.

The poll requested by NBC News/Wall Street Journal shows Clinton continues to lead among presidential nominees of both parties. While some of her Republican opponents have improved, she continues to lead when pitted against them individually.

Clinton enjoys a 44 percent positive rating, which is only surpassed by President Obama's 45 percent. Jeb Bush, one of Clinton's likely opponents in 2016, has a 27 percent positive rating with and even higher negative one of 36 percent. While Sen. Marco Rubio of Florida and Mike Huckabee of Arkansas both have slightly lower positive ratings than Bush -- 23 and 26 percent, respectively -- they also enjoy lower negative ratings.

When confronting three of the potential Republican candidates with the highest ranking, Clinton prevails, at times with a 10-point lead. Bush faced off against Clinton in the closest match of the survey in which the former secretary of state defeated the former Florida governor by eight points, 48 to 40 percent.

Against Sen. Rubio and Gov. Scott Walker of Wisconsin, Clinton does better, gaining 50 and 51 percent, respectively, to Sen. Rubio's 40 and Gov. Walker's 37 percent.

Among Democratic primary voters, the numbers for most of the candidates or likely candidates have continued to rise, with the exception of Lincoln Chaffee, who announced his candidacy in June.

Her support among primary voters surged from 86 percent in March to 92 in June; however, other contenders for the Democratic nomination have also improved. Sen. Bernie Sanders (I-Vt.) has risen to 40 percent support from 21 percent in the same time period. Vice President Joe Biden, who has not announced his intention run but has been put forward as a potential candidate, does better than Sen. Sanders with 65 percent support from 54 in March.

These numbers among Democratic primary voters translate into widespread support for Clinton to be the party's nominee. Seventy-five percent believe said she is their first choice for candidate with Sen. Sanders following in a distant second. However, he won the most votes for second-choice candidate with 35 percent.

Among Republicans, Jeb Bush is the favorite; however, he does not enjoy the same high numbers as Clinton, teetering at around 75 percent of Republican primary voters saying they would support his candidacy. His numbers have improved since April, when he enjoyed 70 percent support. Sen. Rubio has stayed at 74 percent.

Twenty-two percent would choose Bush as their party's first choice and coming in second is Gov. Walker with 17 percent.

These numbers are in part smaller because the GOP line up is three times larger than the Democratic one. Clinton's rise in support, especially from within her party, comes after she held a rally at Roosevelt Island in New York City where she outlined her platform.