Answer :
Final answer:
Lyndon B. Johnson, Bill Clinton, and Barack Obama challenged the NRA during their presidencies, but Donald Trump did not.
Explanation:
Lyndon B. Johnson, Bill Clinton, and Barack Obama all campaigned against the NRA during their presidencies. However, Donald Trump did not pose a significant threat to the NRA and did not campaign against them while in office.
Learn more about Presidents and NRA here:
https://brainly.com/question/42497399