Final answer:
The legislative branch can check the judicial branch by rewriting a law the courts have declared unconstitutional or by having Senate approval for the appointment of justices and federal judges.
Step-by-step explanation:
A check that the legislative branch has over the courts is: Congress may rewrite a law the courts have declared unconstitutional.
When faced with a court ruling that overturns one of its laws, Congress has the power to modify the law or even begin a constitutional amendment process.
Another check is: Senate approval is needed for the appointment of justices and federal judges.