WASHINGTON — A brand new group devoted to selling President Biden’s bold agenda is starting a multimillion-dollar advert marketing campaign trumpeting his Covid restoration package deal and infrastructure proposal whereas contrasting Mr. Biden’s low-key model together with his bombastic predecessor’s.

Constructing Again Collectively, a progressive group run by Biden allies, will air minute-long tv commercials subsequent week in Pennsylvania, Nevada, Georgia and Wisconsin that spotlight the president’s response to the coronavirus and his wide-ranging financial plans. The group is planning to spend over $3 million on a monthlong effort, together with a shorter commercial that can seem on digital platforms in the identical 4 states and in North Carolina.

Each spots differentiate Mr. Biden’s method from that of former President Donald J. Trump.

“You received’t hear him yelling or sending indignant tweets, as a result of for Joe Biden, actions communicate louder,” says a narrator in the television commercial.

The shorter digital advertisement concludes, “No drama, simply outcomes.”

The technique illustrates how decided Democrats are to successfully preserve operating towards Mr. Trump. He could also be out of the White Home, and barred from sending indignant or insulting tweets, however his approval rankings have fallen even lower since he left the presidency, and he stays the very best foil for Mr. Biden, who has saved an unusually low profile for a brand new president.

Mr. Biden, in the meantime, is drawing stable if not spectacular early marks, a mirrored image of the nation’s deep polarization.

In order he turns to an expansive, and costly, menu of home proposals geared toward lifting the financial system, combating poverty and addressing local weather change, his supporters are hoping to retain assist from the voters who helped carry him to victory final yr partly by reminding them of Mr. Biden’s predecessor.

“The message is straightforward: Chaos is out, competence is in, and assistance is right here for People,” stated Stephanie Cutter, an adviser to Constructing Again Collectively who’s near Mr. Biden and high West Wing officers.

The group, whose formation was first reported in February, is happening the air in vote-rich and expensive markets: Las Vegas, Atlanta, Philadelphia and Milwaukee, in addition to Scranton, Pa., Mr. Biden’s childhood dwelling. The group has drawn some scrutiny as a result of it has stated it would not disclose the identity of its donors.

The advertisements are geared toward successful over individuals of shade, upscale white suburbanites and the smaller group of working-class whites who moved from supporting Mr. Trump in 2016 to backing Mr. Biden in 2020. Constructing Again Collectively is especially targeted on retaining the form of impartial and even Republican-leaning voters who backed Mr. Biden however may need voted for G.O.P. candidates farther down the poll.

The aim for this and future advert blitzes, officers say, is to attempt to cement the president’s new coalition by reminding them of what they might have disliked about Mr. Trump and by pitching Mr. Biden’s agenda. They hope that by mixing tv and digital they may attain voters throughout platforms and all through the day.

Along with being essential presidential battlegrounds, Georgia, Nevada, Pennsylvania and Wisconsin even have a number of the most important races for Senate and governor seats subsequent yr.

This new effort, whereas mainly geared toward selling Mr. Biden, may additionally assist Democratic candidates in these states whose fortunes within the midterms will probably be tied largely to the president’s recognition. Many within the occasion, including Mr. Biden himself earlier this year, have stated that former President Barack Obama didn’t do sufficient to focus on his early agenda and paid a worth for it within the 2010 midterm elections.

That is the group’s first promoting marketing campaign, however the group intends to be lively as the primary outdoors group for Mr. Biden, a minimum of by means of subsequent yr’s midterm election. The identify is taken from the president’s marketing campaign slogan, which has grow to be shorthand for his post-Covid financial proposals.