The Republicans are the main backers of the Clarity Act. There are also a handful of Democrats who support the passing of the Bill. Not getting a vote on the bill before the midterm election could reduce the chances of it becoming a law. The Republicans might lose some seats in the elections, which might reduce their dominance or majority in Congress. With Trump's approval rating is dropping, Democrats might take advantage of it. If this happens, it will be challenging to secure the necessary votes to pass the bill in 2027. This September is the best time to hold the vote on the Clarity Act.
Basically, most of the provisions in the bill have strong support from both parties. Only a few provisions are still facing opposition from Democrats, with the strongest opposition being to the ethics provision related to Trump and his family's interest in the industry.
So if that provision is removed, I think the bill will eventually pass even if Democrats take control of the House.
The bill is necessary because it gives the government a way to regulate crypto more closely, and both parties understand that better than anyone. So, it will eventually pass despite the current delay.