Bangladesh, Sept. 17 -- The battle over cryptocurrency regulation in the United States has increasingly become intertwined with questions about presidential ethics, political influence and the personal financial interests of President Donald Trump.

Congressional Democrats are using Trump's rapidly expanding crypto fortune to challenge legislation that would establish a comprehensive federal framework for digital assets, arguing that the proposed rules do not go far enough to address potential conflicts of interest involving the president and his family.

The confrontation intensified this week as the Senate considered whether to advance the Digital Asset Market Clarity Act, a sweeping bill intended to clarify regulatory responsibilities...