Her primary campaign was poorly run in 2019 and was only geared toward the primaries at that point, and all of her other campaigns were just in California. She needs top tier talent with national experience for this campaign. Ideally she will have some Obama campaign veterans running the ground game, because they ran the best ground game this party has had this century, and her on-the-ground and targeting strategy will probably be closer to Obama's than the strategy she and Biden had in 2020.

January and that they'll be glad of the rest (or something to that effect). "several veterans from the administration of Barack Obama" I wonder does that include them ?

There were definable trends in 2020. Much more at the link.

https://www.pewresearch.org/politics/2021/06/30/behind-bidens-2020-victory/

Apart from the small shift among Hispanic voters, Joe Biden’s electoral coalition looked much like Hillary Clinton’s, with Black, Hispanic and Asian voters and those of other races casting about four-in-ten of his votes. Black voters remained overwhelmingly loyal to the Democratic Party, voting 92%-8% for Biden.
Biden made gains with men, while Trump improved among women, narrowing the gender gap. The gender gap in the 2020 election was narrower than it had been in 2016, both because of gains that Biden made among men and because of gains Trump made among women. In 2020, men were almost evenly divided between Trump and Biden, unlike in 2016 when Trump won men by 11 points. Trump won a slightly larger share of women’s votes in 2020 than in 2016 (44% vs. 39%), while Biden’s share among women was nearly identical to Clinton’s (55% vs. 54%).
Biden improved over Clinton among White non-college voters. White voters without a college degree were critical to Trump’s victory in 2016, when he won the group by 64% to 28%. In 2018, Democrats were able to gain some ground with these voters, earning 36% of the White, non-college vote to Republicans’ 61%. In 2020, Biden roughly maintained Democrats’ 2018 share among the group, improving upon Clinton’s 2016 performance by receiving the votes of 33%. But Trump’s share of the vote among this group – who represented 42% of the total electorate this year – was nearly identical to his vote share in 2016 (65%).
Biden grew his support with some religious groups while Trump held his ground. Both Trump and Biden held onto or gained with large groups within their respective religious coalitions. Trump’s strong support among White evangelical Protestants ticked up (77% in 2016, 84% in 2020) while Biden got more support among atheists and agnostics than did Clinton in 2016.