The pollster's presidential model has Harris leading Donald Trump nationally by 1.2 points.
www.newsweek.com
The blue wall has always been the strategy, I think.
In terms of trying to win congress also and campaigning in California, and other such places, if I were a strategist, I'd consider it a lack of focus.
Personally, I would love to see "disenfranchised Silicon Valley" (lost jobs, lost homes, forced to move in the last 4 years) come back into the fold.
But, I think strategically, losing congress and winning the presidency is by far the better result, than losing the presidency and winning congress.
The "opportunity economy" message can fit the opportunities in each state.
If Harris actually hears people's problems, I think stumping locally and engaging swing and ambivalent voters in in-depth conversations would do wonders--not a lot of time though. If she empathizes as well as claimed, that step could lead to a lot of local earned media.