All of the following represent examples of the use of checks and balances except

Responses

the 35 successful vetoes made by President George Bush
the 35 successful vetoes made by President George Bush

Congress passing the Crime Bill after a conference committee made changes.
Congress passing the Crime Bill after a conference committee made changes.

Congress invoking the provisions of the War Powers Act
Congress invoking the provisions of the War Powers Act

The Supreme Court ruling the Flag Desecration Act unconstitutional
The Supreme Court ruling the Flag Desecration Act unconstitutional

Both of the options listed in the question are the same, but assuming you meant to provide four options:

The answer is: the 35 successful vetoes made by President George Bush.

The other three options all represent examples of checks and balances being used as designed by the framers of the U.S. Constitution. The War Powers Act is an example of Congress checking the power of the president to commit the country to war. The Supreme Court ruling a law unconstitutional is an example of the judicial branch checking the power of the legislative and executive branches to enact and enforce laws that are unconstitutional. And Congress passing a bill after changes were made in a conference committee is an example of the legislative branch using its power to check itself and ensure that the process of passing a law includes multiple reviews and revisions before it is final. However, the president's use of the veto power is not an example of checks and balances, but rather an example of an individual branch (in this case, the executive branch) using a power granted to it by the Constitution.