Lack of a compelling narrative to motivate and engage people

Not enough perceived distinction between Biden and Harris

Letting in a large number of undocumented immigrants claiming asylum

Tribal politics and villification of the out-group

Focused more on cultural issues than helping the middle class

Their policies led to inflation and they denied the economy was bad

Harris nominated Tim Walz instead of Josh Shapiro

Biden actively sabotaged Harris out of spite

https://www.youtube.com/watch?v=QFgcqB8-AxE

They actually won the election in 50% of parallel universes and we're merely living in one of the other 50%

They miscalculated just how popular Trump's platform of ending democracy and installing plutarchy and chaos would be

Trump had the mandate of heaven and was going to win no matter what

Failure to present themselves as fighting for lower and middle classes

Russian Interference and Social Media Algorithms pushing controversial and divisive content 

They can still win if Kamala Harris has the courage

Sending Israel Weapons despite the alleged Genocide and Human Rights abuses in Gaza made Democrats unpopular to parts of the left

Key voters were alienated by Democrats’ patronizing rhetoric

America is “not ready for a woman president”

Neglected reaching out to Hispanic voters

Failed to convince people that Trump is fascist

Covid lock downs and vaccine mandates attributed to Democrats

Seen as the party of bigger government and overreach

Because they were always negative while Trump offered a bright vision of the future

 Not enough perceived distinction between Harris and Trump

Joe Biden was both a weak candidate and dropped out too late.

The median voter at least felt worse off economically under Biden.

Harris refused to take a position on whether Vriska did nothing wrong

Disdain for institutions, including the mainstream media, higher education, and government bureaucracies.

starlinks used to interfere with voting machines

Chinese Interference and Social Media Algorithms pushing controversial and divisive content

The Republican Party swept the 2024 election, winning the presidency, all swing states, the national popular vote, the Senate, and (likely) the House.

What caused this (in particular, what caused the POTUS result)?

This market starts with 10 placeholders. Comment a reason and I'll edit it in (limit one per user). After all placeholders are taken up, I'll open it up so anyone can add answers. This market will remain open until the end of the month. After that, there will be a voting process to determine the top options.

For the vote, I will write a comment for each option, and the top 5 in terms of likes will resolve YES, all other options will resolve NO. If there's a tie, the tied options will resolve to %. 

The vote will run for about a week and it will close at a random time. I won't bet on this market.

Reasons must refer to one specific thing, e.g. "High inflation and lack of competitive primary" is not allowed. I may N/A options that do not adhere to this rule or are too similar to another option.

Users are encouraged to persuade others in the comments section.

This is my first time running a market like this, suggestions welcome!