you're as stupid as *Edited*. and that is saying something.
The courts have NO JURISDICTION over how congress operates internally. The courts CANNOT stop, delay or in any way interfere with an impeachment, period. You could pack every court in the country with conservative leaning judges, and it means exactly jack shit.
The courts cannot stop an impeachment. A sitting President cannot stop an impeachment. An Attorney General cannot stop an impeachment.
If you think a sitting President can do an end run around the process and just magically declare no impeachment, and that Congress would just say 'Oh, ok, never mind then', you're quite simply a moron.