In a further role reversal, Gingrich may have positioned himself to fill it.
( ( In ( a ( further ( role reversal ) ) ) ) ( , ( Gingrich ( ( may ( have ( positioned ( himself ( to ( fill it ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT a) (JJ further) (NN role) (NN reversal))) (, ,) (NP (NNP Gingrich)) (VP (MD may) (VP (VB have) (VP (VBN positioned) (S (NP (PRP himself)) (VP (TO to) (VP (VB fill) (NP (PRP it)))))))) (. .)))
Gingrich will not fill the position. 
( Gingrich ( ( ( will not ) ( fill ( the position ) ) ) . ) )
(ROOT (S (NP (NNP Gingrich)) (VP (MD will) (RB not) (VP (VB fill) (NP (DT the) (NN position)))) (. .)))