When will Kamala replace Joe?

They have to wait long enough to make it look legit / plausible. Right now, and probably through the end of the year, any move is going to be fresh meat for the election conspiracy theory.

When Joe's 2 term limit is reached.

According to the Quimanon losers it was supposed to happen last November.

Probably in July or August this year.  Biden is not even close to being qualified to be the president.

When Joe is unable to swallow his applesauce.

They are already not getting along.

I suspect Joe regrets being a "team player" with Numb Nancy and the DNC now.

I strongly suspect (and have from the beginning) that it was not his call..and that the machinery to replace him with The Unelectable One was put in place before he was elected.

The 2023 guy has a point..if their "relationship" can last that long.

First Kamala will resign, and Biden will make Hillary Vice-President.

Then Biden will resign, making Hillary President,

Then Hillary will appoint AOC as Vice President, in order to "own the MAGAs".

Enjoy!

Biden looks every bit as old as Prince Phillip and Phillip is an exception to the rule. 

Anyway, with the way term limits work.... I expect Harris to assume office somewhere after January 21 2023. If Harris assumes office before this date, she will only be eligible to run in 1 reelection campaign. 

The Prince died at 99, Joe gets 8 years.

She's working on slapping him with the 25th amendment and putting the old codger into a nursing home.