…They claim the Dems are undemocratic because Kamala didn't become the presidential nominee through primaries?

Here's what to tell MAGA folks when they start kvetching that Biden got 14 million votes in the primaries while Kamala got none:

1. 81 MILLION people (almost 6 times as many as Biden's primary votes) voted for Kamala Harris when she ran for Vice President in 2020 (and that same 14 million who voted for Biden this year also voted for her again in the Democratic primaries)—and the entire electorate will get to vote on this very shortly.

2. She has Biden's (and both Obamas' and both Clintons') strong endorsement as well as pretty much every major non-MAGA politician from AOC and Bernie on the left to Liz Cheney, her father the former VP, and conservative columnist George Will along with a bunch of former Trump senior staffers on the right—precisely BECAUSE Trump presents an existential threat to democracy.

3. She got endorsements from practically every delegate pledged to Biden once he withdrew.

4. The whole idea of HAVING a VP is to have a mechanism in place if the president can't continue. Listing them in reverse chronological order, LBJ, Harry Truman, Calvin Coolidge, Teddy Roosevelt,  Chester Arthur, Andrew Johnson, Millard Fillmore, and John Tyler all became president without ANYONE voting them into that office. They were sitting VPs when the president died. If people feel that Kamala's nomination was unfairly undemocratic, they have the option not to vote for her on November 5.

5. MAGA people are opening quite the can of worms by bringing up undemocratic attitudes. Because THEIR guy is super-vulnerable on this. Not only has Trump openly stated he wants to be a dictator but his speeches are jam-packed with attacks on minority groups, calls for retribution against his enemies, endorsements of other dictators including Orban, Xi, Putin, and Kim among others, not to mention endorsing the savage but fictional cannibal Hannibal Lecter. Project 2025, which Trump falsely claims to know nothing about, is a roadmap for overthrowing democracy—created with help from more than 140 past and  present Trump employees and naming Trump numerous times. And that is just one of his tens of thousands of documented lies (30,573 just during his time as president, 162 in a single recent so-called press conference that did not take actual on-the-fly questions and did not subject him to being in the same room with his hand-picked panel). Agenda 47, which Trump does endorse and which the GOP has adopted as this year's platform, sounds an awful lot like a simplified, less detailed Project 2025.

6. And Trump not only has an extremely undemocratic record in his four years as president, a lot of the guardrails that kept him at least somewhat in check have been taken away—starting with the loony Supreme Court decision that found a president can not be held accountable for any action that was taken in his role as president.

7. Finally, do we even need to mention that sore loser Trump is the ONLY US president who refused to hand over power peacefully at the end of his term, who incited a riot in a vain (and in-vain) attempt to incite a coup, who filed roughly 60 lawsuits to overturn the will of the people, many of which were tossed out by judges he had appointed? And, of course, he's the only US president to be charged with 94 felonies and to be found guilty of 34 of them in the one trial that has taken place so far, not to mention held liable for $454 MM in the aftermath of just one of many suits against him for slanders and credible allegations of abusing women.