Final answer:
Candidates should be cautious about their use of negative ads because they can create doubt about opponents and stretch the truth.
Step-by-step explanation:
Candidates should be cautious about their use of negative ads because the primary purpose of negative ads is generally to create doubt about opponents by framing aspects of their characters and policies in the worst possible light. In trying to portray competitors in the worst possible light, negative ads often stretch the truth, which can call into question the honesty of the candidate running the ad.
Learn more about The impact and importance of negative campaign ads