I didn't watch the debate. But I listened to what a lot of people said about it . And I observed the stock market going up a lot the next day, suggesting that Trump won the debate.
I have a conclusion about it that will surprise you. Trump won the debate because of what Biden said with authority: "I am the Democrat Party". He also was against, or pretended to be against, Medicare-For-All and the Green New Deal. Those statements were poison for all the socialists in the Democrat Party, including Kamala Harris, who never takes questions from the press, and most other Democrats. Joe won the Democrat primary by claiming to be a socialist.
Biden was also thought of as a friendly guy, although he was not one at Tuesday's debate. Trump should have let Biden speak -- the more time he has to speak, the less he says! Biden is a man of platitudes, not accomplishments, and falsely blaming his opponent for everything that went wrong, including the pandemic and urban street riots. Trump is obnoxious, and he proved it. Women don't like that. He has two more debates to avoid excessive interruptions. But Hispanics liked Trump's "fight" for the truth, believe it or not.
I don't care much about politicians talking platitudes, empty promises, taking credit for things they didn't cause, and claiming their opponent will cause a disaster if elected. Politicians like to talk, but I don't like to listen to them talking. I like to judge them by accomplishments in their life. Donald Trump has accomplished a lot more than Joe Biden. He is also obnoxious, always bragging about himself, and exaggerating his accomplishments.
The last two years were tough for Trump, with Democrats controlling the House, and then a pandemic he could do almost nothing about. State governors appointed themselves as dictators, stealing our freedoms without a fight. But the number of COVID deaths, COVID hospitalizations, and economic damage, strongly suggests most state governors did a poor job ... especially when not protecting helpless people in nursing homes.
Of course people learn by listening, not hearing themselves talk, so I listened to what many people said about the "debate". My personal feeling is that if there are three debates, people will mainly remember the last one.
If you cherry picked small portions of the debate, Trump said things that would get him reelected. If you focused on the frequent interruptions every time Trump thought Biden lied, that will hurt Trump with white suburban women who wanted "polite". I will add that any interruption of more than a word or two, such as "He lies", can't be heard when two people are talking at the same time.
Biden's embarrassing non answer to the radical idea of stacking the Supreme Court with extra Democrats and ending the Senate filibuster rule (needing 60 votes, rather than 50) was a highlight (lowlight) ...
He and fellow Democrats are obviously for a radical takeover of the Supreme Court if they get a majority in the Senate. Not that a president has anything to do with Senate rules set by the majority, and Senate majority approvals of justices. But presidents do nominate justices, and Biden's non answer reveals he'd nominate more justices (more than nine) if given the chance. For that reason alone, no one should vote for Joe Biden.
For future debates I suggest to both candidates that two people talking at the same time is just noise. Trump has to behave himself in spite of Biden lies. The longer Biden gets to talk, the better off Trump is. And if any candidate fails to present specifics, such as supporting data, all they have given the public is their unsupported generic opinion.
