The Clarity Act, a landmark bill that would create a U.S. regulatory framework for the crypto industry, is set to undergo a Senate committee markup starting Thursday. The prospect of its passage has buoyed investors, but significant obstacles remain before the bill is ready for Congress to send to President Trump’s desk.

Clarity, short for Digital Asset Market Clarity Act, passed the House of Representatives last year but has faced setbacks in the Senate Banking Committee as banks and stablecoin companies squabble over the question of how and when rewards can be paid on stablecoin balances. Now, as Senators convene to introduce amendments, Democrats are pushing for ethics guardrails related to the Trump family’s crypto involvement.

Members of the Senate Banking committee have filed over 130 proposed amendments ahead of Thursday’s markup, with 44 coming from Sen. Elizabeth Warren (D-Mass.) alone, according to a copy of the proposed amendments reviewed by Fortune.

While some of the proposed amendments are minor, others seek to advance the position of opponents to the bill, which include banking interests who fear stablecoins could denude bank deposits, and those who fear crypto’s expansion is fraught with ethical and national security implications.