evidence: "The campaign specifically told us that they support all of the tax increases on the high earners and corporations that are in the Biden budget, but they did not tell us" those changes would directly pay for Friday’s tax proposals, CFRB senior vice president Marc Goldwein told Semafor. "And obviously, none of them is specifically mentioned in this [Harris] plan." If Harris’ campaign stands by its statement to CFRB, that would go a long way toward filling in the fiscal blanks as she starts rolling out specific policy proposals. The tax plans she released Friday would cost roughly $2 trillion over 10 years, according to CFRB, while the proposed tax increases that Biden’s budget largely aimed at the wealthiest Americans and large corporations would raise nearly $5 trillion over 10 years. [...] The Democratic platform, though it was crafted before Biden dropped out of the race and features several references to his "second term," includes several other tax changes that appear in Biden’s fiscal year 2025 budget. Among them: support for the 25% "billionaire tax" on the income of the super-rich who claim more than $100 million in assets and quadrupling the stock buyback tax to 4%.