" Once approved by Congress, the joint resolution proposing a constitutional amendment does not require presidential approval before it goes out to the states. While Article I Section 7 provides that all federal legislation must, before becoming Law, be presented to the president for his or her signature or veto, Article V provides no such requirement for constitutional amendments approved by Congress or by a federal convention. Thus, the president has no official function in the process.[b] In Hollingsworth v. Virginia (1798), the Supreme Court affirmed that it is not necessary to place constitutional amendments before the president for approval or veto.[10]"

If Democrats win control of the House and Senate what amendments would most likely be ratified by 38 states? We could have an amendment to increase the federal minimum wage and tie it to the cost of living or quality healthcare as a basic human right or ban political free speech protections for non-human legal entities or ban broad immunity for the president and allow the pardon power of the president to be blocked by The Speaker of the House and Senate Majority Leader.

What hypothetical amendments would have the most support?

If he didn't rip up the Iran nuclear deal none of this would have happened. This is Trump's war. This will add hundreds of billions to the national debt. If you want to know why we can't afford halfway decent healthcare for a wealthy developed country, then this is why.

He could have just followed through on the deal years ago. He creates problems then tries to solve the same problems he created in the first place. Impeach Trump!