Final answer:
Some people questioned the constitutionality of a national bank because the Constitution did not specifically grant the government the right to establish a bank. James Madison and Thomas Jefferson, among others, objected to the national bank in the 1790s and argued that it exceeded the powers granted to the federal government.
Step-by-step explanation:
Some people questioned the constitutionality of a national bank because the Constitution did not specifically say that the government had the right to establish a bank. The issue of the national bank's constitutionality was particularly debated by James Madison and Thomas Jefferson in the 1790s. They believed in strict construction when interpreting the Constitution and thought that the establishment of a national bank exceeded the powers granted to the federal government.