
Ed M. answered 03/29/16
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Help with grammar, French, SAT Writing, the TOEFL and ESL.
You use the past tense of the auxiliary do, i.e., did, in your question, which then restricts the context of your question to sometime in the past, either as a broad generalization about conditions the past prior to the present (which you would thus imply are different from now) or perhaps to a specific past time period or group of politicians who existed in the past. If this was truly your intention, you would need to supply more information about the specific context of your question for it to be answered adequately.
But I suspect you are really trying to ask a general, universal question about politicians in all time periods, the form of which would then be What do politicians do to make people like them? using the present tense of the auxiliary. Maybe you originally thought of composing your question this way but the repetition of do on both sides of politicians struck you as a little strange--or you thought your audience might view it as strange--but I assure you it's entirely grammatically correct (the second do just happens to be the main verb of the sentence the question is based on), if you are indeed attempting to state a general, time-independent question.