“Illegal immigrant students”
Why do they have standing to sue anyone?
Injury or prospective injury confers standing - people with no legal right to be present sue every day in courts. If legislation granting something very valuable to them would pass but for an unconstitutional obstruction, that’s perfect standing. The case should be dismissed on other grounds, that it is a political question, which is lawyer talk for courts abstaining from interpreting how the Senate exercises its constitutional power to make and enforce its own rules.