Vice President Kamala Harris was closing in Monday on securing the Democratic delegates she needs to become her party's nominee and set a new fundraising record in her first 24 hours as a presidential candidate, as top Democrats rallied to her in their bid to defeat Republican Donald Trump. Aiming to put weeks of intraparty drama over President Joe Biden’s prospects behind them, prominent Democratic elected officials, party leaders and political organizations quickly lined up behind Harris. Worries over Biden's fitness for office were replaced by fresh signs of unity after a seismic shift to the presidential contest that upended both major political parties’ carefully honed plans for the 2024 race. MORE: https://www.cbs8.com/article/news/nation-world/harris-democratic-nomination-potus/507-d89cb444-0008-4cb5-a11e-88b0d7f55090