Billionaire tax gains momentum

Democrats are facing hurdles to making a new annual tax on billionaires’ investment gains a reality.

The proposal, championed by Senate Finance Committee Chairman Ron Wyden (D-Ore.), is seen as a way to help pay for the party’s social spending package while accommodating Sen. Kyrsten Sinema’s (D-Ariz.) opposition to raising tax rates.

But some Democratic lawmakers have expressed reluctance to including a new tax proposal in the package, and tax experts say there could be challenges in crafting its details.