There is, nevertheless, at least one event or entity that has no cause or precedent. The necessity for causation is negated by the observation of existence.
Are you referring to the logical fallacy in the Kalam assertion which assumes non-causality as an axiom for 'create' to prove causality? In that case the Senator's assertion is precisely on the mark ... the Kalam is an illogical syllogism if used to try and prove a cause using a non-cause as the fundamental axiom.