Final answer:
In 2010, the Republican majority in Congress took measures to limit the president's influence over committee chair appointments, continuing the historical battle for power balance between the presidency and the legislative branch.
Step-by-step explanation:
In 2010, the Republican majority voted to limit the president's ability to appoint chairmen of senate committees. Committee chairs wield significant power within the U.S. legislative process, controlling the committee's budget, deciding when the committee convenes, and determining the bills that will be considered. While the provided information does not give specifics on a 2010 vote about chair appointments, historically, the composition and leadership of committees are typically under the control of the majority party in each house of Congress. Hence, the ability of a president to influence committee chair appointments is indirectly affected by the majority party's rules and decisions. Additionally, legislation like the Tenure of Office Act has previously been used to restrict presidential power over appointments and removals, echoing the contentious balance of power between the presidency and Congress.