Credibility is a vital factor, and Jim Lehrer does, indeed, have it.
( ( ( ( ( Credibility ( is ( a ( vital factor ) ) ) ) , ) and ) ( ( Jim Lehrer ) ( ( ( ( does , ) indeed ) , ) ( have it ) ) ) ) . )
(ROOT (S (S (NP (NN Credibility)) (VP (VBZ is) (NP (DT a) (JJ vital) (NN factor)))) (, ,) (CC and) (S (NP (NNP Jim) (NNP Lehrer)) (VP (VBZ does) (, ,) (ADVP (RB indeed)) (, ,) (S (VP (VB have) (NP (PRP it)))))) (. .)))
Jim Lehrer has no credibility whatsoever.
( ( Jim Lehrer ) ( ( ( has ( no credibility ) ) whatsoever ) . ) )
(ROOT (S (NP (NNP Jim) (NNP Lehrer)) (VP (VBZ has) (NP (DT no) (NN credibility)) (ADVP (RB whatsoever))) (. .)))