Former Vice President Joe Biden Joe BidenPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Fox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio MORE sought to gin up support for his presidential campaign's health care policy during Wednesday night's Democratic presidential primary debates.

Biden's campaign sent a press release to supporters advertising the gift of a sticker reading "Obamacare: It's a BFD" after his fellow 2020 contenders attacked his health care policy that seeks to "protect and build on Obamacare."

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The sticker's message refers to an expletive Biden was recorded uttering to then-President Obama at a 2010 signing ceremony for the Affordable Care Act: "This is a big f---ing deal."

Biden, widely viewed as the front-runner for the Democratic nomination according to most polls, weathered attacks from several fellow 2020 contenders Wednesday night including Sens. Kamala Harris Kamala HarrisHundreds of lawyers from nation's oldest African American sorority join effort to fight voter suppression Biden picks up endorsement from progressive climate group 350 Action 3 reasons why Biden is misreading the politics of court packing MORE (D-Calif.) and Kirsten Gillibrand Kirsten GillibrandSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Suburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits MORE (D-N.Y.) and New York City Mayor Bill de Blasio Bill de BlasioOVERNIGHT ENERGY: California seeks to sell only electric cars by 2035 | EPA threatens to close New York City office after Trump threats to 'anarchist' cities | House energy package sparks criticism from left and right EPA threatens to close New York City office after Trump threats to 'anarchist' cities New Year's Eve in Times Square to be largely virtual amid pandemic MORE.

Biden attacked Harris for her "Medicare for All" plan, warning of tax increases and the elimination of employer-based private insurance, continuing a tussle between two front-runners that began in the first debate.

"Your plan does not cover everyone in America,” Harris told Biden Wednesday night, adding: "our plan will bring health care to all Americans under a Medicare for All system"

Harris responds to Biden's criticisms: "Unfortunately, Vice President Biden, you're just simply inaccurate in what you're describing. The reality is that our plan will bring healthcare to all Americans under a Medicare for All system" #DemDebate pic.twitter.com/YNPTiUh7Pu — CNN Politics (@CNNPolitics) August 1, 2019

The central debate is between Harris’s plan of Medicare for All versus Biden’s more moderate plan to give people the option of a government-run plan but also allow private insurance to remain.