Answer:
Republican presidents have usually appointed liberal justices.
Explanation:
President Bush has appointed 327 federal judges, two of whom have been appointed to serve on the U.S. Supreme Court. President Clinton also appointed a large number of judges, 378 in total, where 66 of them were appointed to serve on the District and Appeal Courts. These nominations are usually made within the president's own party and serve to give him information about the government even after leaving office.
Accordingly, we can eliminate and consider the option "Republican presidents have usually appointed liberal justices" to be incorrect.