The left would not want to acknowledge that about their martyr Kennedy.
Although I don't understand your question regarding that somehow cutting taxes must increase government revenue just because Clinton managed a balanced budget in 2000 which came after (in the case of Kennedy, decades after) the Kennedy and Reagan tax cuts. Are you implying that taxes were never raised after Kennedy or Reagan? Besides which, the deficit refers only to spending and revenue of that year alone. Its silly to talk about the tax policy from 20 or 40 years prior.