

As you’ve discovered, there’s another element before a court accepts a case. Standing.
To have standing, you must show that you have a personal and direct stake in the outcome. You cannot sue just because you are angry or disagree with a law. Courts only solve real, active disputes, not hypothetical questions.
Congress has to bring the suit. Courts have routinely held that in order for “Congress” to have standing in court, they must show that “Congress” has a direct stake in the outcome. To show they do so have such a stake, they routinely vote on a Resolution to establish that Congress as a body is bringing the case.
So while individual members might try to bring a case, it really depends on what’s to be litigated before the court. A President not following the law usually indicates that Congress who created the law, is the one who is to bring it. But if the President does something that affects specifically a single member, then that member by themselves would have standing.
Citizens can sue if they can show they were directly harmed and have a direct stake in some resolution to the harm.
As far as, the Senate or the House, it depends on the injury being talked about. A simple resolution from a single chamber is the most common when the injury is specific to that chamber. A joint or concurrent resolution (by both chambers) usually is to address a broad power violation. It really depends and it’s up to the Judge to uses what’s come before as a guide.
The House usually originates the spending, and so if that’s the topic, usually just the House is enough. If the President is abusing something like war powers, then that is indicated in the Constitution as “Congress” as in the entire thing. So both chambers might be needed to have standing, unless the issue at hand is that “The President has abused their war powers and not reported to the House Oversight Committee”. In that case, the argument is that the President isn’t reporting their abuse to a single chamber and thus only the House is required to have standing. Same if the Senate is conducting an investigation and the President refuses the subpoena. The injury is just to the Senate in that case.
It all depends on how the entire thing is brought before the court.











Right? There’s a legal distinction here and if the hiring people weren’t aware of that distinction then, that’s on the HR.
Someone who has engaged is VERY DIFFERENT than someone who is a victim of.
And you know, they’re kind of a law agency related thing, the FBI is… Ya know?! Like the FBI does law stuff… Just. I don’t have words here. It’s like five year olds running the place or something and actually that feels insulting to five year olds.