Vice President Kamala Harris reintroduced herself to voters at the Democratic National Convention as the party’s new nominee, but the message she delivered was different from her previous presidential bid.Harris’ campaign is walking back some of the more liberal positions she embraced during the Democratic primary in 2019. It comes as former President Donald Trump frames her as far-left. Harris hasn’t directly addressed these reversals during stump speeches and she has yet to hold a formal press conference since launching her candidacy more than one month ago. Political analysts say those policy shifts come with potential benefits and risks. "Running for the nomination of a party is very, very different than running for a general election, which we know is going to be razor thin and going to be decided by the moderates," said Dr. Casey Burgat, George Washington University’s Legislative Affairs Program director. "The risk is that she looks like a flip-flopper and historically, that's been a pretty damaging charge."On energy policy, the Harris campaign has said she’s no longer backing a ban on fracking, the oil and natural gas extraction process. On immigration, she’s walking back her prior push to make illegal border crossings a civil offense rather than a criminal one. Now, she’s standing behind Biden Administration policies that have toughened penalties for illegal crossings. "I know that we can live up to our proud heritage as a nation of immigrants and reform our broken immigration system,” Harris said during her speech Thursday at the DNC. As for health care, the Harris campaign says “Medicare for All” will not be a part of her agenda. Harris co-sponsored the proposal as a California Senator and she presented a modified plan during her first presidential bid. This time around, Harris’ message is focused on lowering prescription drug costs and strengthening the current healthcare system under the Affordable Care Act.When it comes to gun policy, Harris’ campaign says she is no longer pushing a mandatory gun buyback program for assault weapons, but she continues to support other reforms. "We are going to pass universal background checks, red flag laws and an assault weapons ban,” Harris said during a rally in battleground Pennsylvania. In a statement, her campaign said her current positions have been shaped by “three years of effective governance” and reflect her “pragmatic approach, focusing on common-sense solutions for the sake of progress."A new poll suggests both sides still have an opportunity to shape the public’s perception of Harris.A recent CBS News - YouGov poll found more than a third of registered voters don’t know what Harris stands for, and voters had differing views on how much her policies align with President Joe Biden. Trump's policy stances have also evolved over the years, including on abortion. As a private citizen, Trump previously described himself as "pro-choice." In his political career, he previously endorsed national abortion restrictions but he now says the issue should be left up to the states.