Tariffs were inevitable, in any administration. Unless the plan was to have been much worse. With all due respect, truly, I'm sure that you don't understand how the international monetary system works at a basic level. For reasons, tariffs were inevitable. All sides have been preparing.
Kamala Harris had zero chance of winning, lost in a landslide, and could have said whatever she pleased because she was never going to be there to follow through. Believe they knew she didn't have a chance. She was truly a candidate who could not win. Hillary Clinton could not beat Donald Trump, and she was a vastly superior candidate. Anyone with political horse sense knew that the first woman POTUS would not be Kamala Harris. Forcing Biden out was equivalent to throwing the election. Though, I'm not saying that I know that he would have won.
Second, I look at policy to inform on politician intention. I recommend that you do the same. Instead of looking at stated intent.
Preparation for reshoring under Joe Biden:
https://en.wikipedia.org/wiki/CHIPS_and_Science_Act
https://www.wri.org/insights/inflation-reduction-act-anniver...
Herded via tariffs, look for foreign-owned companies to begin setting up in Foreign Trade Zones on US soil. Thereby avoiding tariffs.
https://www.msn.com/en-us/money/economy/foreign-trade-zones-...
https://www.federalregister.gov/documents/2023/04/17/2023-08...
https://en.wikipedia.org/wiki/Foreign-trade_zones_of_the_Uni...