What was Marshall likely to side withMarbury or Madison why?

Chief Justice John Marshall was likely to side with William Marbury in the case of Marbury v. Madison because it presented an opportunity to assert the authority of the Supreme Court and establish the principle of judicial review. By siding with Marbury, Marshall could affirm the judiciary's role in interpreting the law and check the powers of the executive branch. However, he ultimately chose to dismiss the case on jurisdictional grounds, which allowed him to avoid a direct confrontation with President Jefferson while still laying the groundwork for the Court's future authority.