Trump is running against Harris, but he can't seem to stop attacking Biden

Despite a new Democratic opponent who entered the race some three weeks ago , former President Donald Trump appears to be still focused on the man no longer in the race -- President Joe Biden.

Ever since Vice President Kamala Harris took over the top of the Democratic ticket , the Trump campaign and his allies have attempted to turn their focus toward the new Democratic rival -- but on the campaign trail so far, Trump has kept up attacks on the current president as he struggles to define Harris .

At campaign rallies and during interviews, Trump has characterized Biden exiting the race as a "coup" even though Democrats rallied around the newly minted ticket and largely haven't pushed back on the sudden change in presidential candidates. Most recently, he brought it up during his conversation with tech mogul Elon Musk on X Monday night .

"We have somebody that hasn't received one vote for president and she's running," Trump said during a news conference in Mar-a-Lago last week .

He also falsely claimed that Democrats would have invoked the 25th Amendment if Biden didn't step down willingly. The 25th Amendment says that the vice president replaces the president if they die in office or resign, or if members of the president's Cabinet decide the president is unable to fulfill the duties of the office. Some members of Trump's own Cabinet and his allies discussed invoking the 25th Amendment after the attacks at the U.S. Capitol on Jan. 6, 2021.

And even as he says he finds Harris to be an easier rival, Trump has repeatedly pushed baseless claims about the possibility of Harris being replaced, saying that Biden could make a "comeback" or that the Democratic Party could replace Harris with another candidate.

So far on the campaign trail, many of Trump's attacks on Harris have centered on his old lines of attack against Biden and painting her as "worse" than the sitting president, including calling her "more radical" than Biden.

As he attacks both Biden and Harris, Trump insists that he hasn't recalibrated his campaign to focus solely on Harris, saying, "It's the same policies: open borders, weak on crime."

In a direct attack against Harris, Trump has repeated the false claim that Harris was appointed "border czar," a label that has stuck with the vice president since Biden tasked her with leading diplomatic talks to address the root causes of migration from El Salvador, Honduras and Guatemala.

Trump has also attacked her for supporting a ban on fracking, single-payer healthcare such as "Medicare for All," inflation and the economy.

In addition to her record as vice president, the Trump campaign has tried to differentiate themselves from Harris, scrutinizing her over the lack of media appearances since becoming the nominee.

"Kamala refuses to do interviews because her team realizes she is unable to answer questions, much like Biden was not able to answer questions, but for different reasons," Trump wrote in a social media post.

The Trump campaign stresses that in the more than 20 days since Harris has become the nominee, she has not yet had media availability.

By contrast, in the past week, Trump held the news conference in Palm Beach, Florida, and his running mate Sen. JD Vance spoke to the press daily during a battleground blitz mirroring Harris' trip with her running mate, Minnesota Gov. Tim Walz.