This could be an interesting wrinkle although expecting Rubio to stand firm on his ideas is probably too big a leap.
Rubio and Lee could have demanded as the essential 51th and 50th votes of the tax bill for a trivial 0.94% increase in the corporate tax rate to expand the child tax credit to at least pretend like they cared before it was stripped away in the House/Senate reconciliation committee yet they didn't even have the spine for that