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)))))) (. .)))
Everyone would believe whatever Jim Lehrer said.
( Everyone ( ( would ( believe ( whatever ( ( Jim Lehrer ) said ) ) ) ) . ) )
(ROOT (S (NP (NN Everyone)) (VP (MD would) (VP (VB believe) (SBAR (WHNP (WDT whatever)) (S (NP (NNP Jim) (NNP Lehrer)) (VP (VBD said)))))) (. .)))