Trump and other politicians should not be able to get away with saying false, defaming things. Instead they should be held just as accountable as anyone else who tries to say thing that are not true and are hurtful to another person or group of people. The lies need to stop.
The problem with defamation laws is that you can only win your case if you are able to prove actual malice, i.e. that the person defaming you knew for a fact that what they are saying is not true. Politicians should be held accountable under defamation laws only if it can be proven that they knew what they were saying was false.
When a politician speaks publicly at an event that is televised to the whole country, they should be held accountable if they habitually make incorrect statements that defame others. Politicians have whole teams of people advising them, writing speeches, and managing campaigns, so there is no excuse for such misinformation because people view them as a trustworthy authority and thus they have great responsibility to uphold the truth.
Politicians should be held personally accountable under defamation laws. Today, politicians willingly misstate facts in an effort to denounce their opponents. They do it because they can get away with it since they will not be sued under defamation laws. If politicians had to pay a price, they would not blatantly disregard the truth.