The Secret Service agent felt strongly that the situation in Washington was too unstable for the President to return there, and Card agreed.
( ( ( ( ( ( The ( Secret ( Service agent ) ) ) ( ( felt strongly ) ( that ( ( ( the situation ) ( in Washington ) ) ( ( was ( too ( unstable ( for ( the President ) ) ) ) ) ( to ( return there ) ) ) ) ) ) ) , ) and ) ( Card agreed ) ) . )
(ROOT (S (S (NP (DT The) (JJ Secret) (NNP Service) (NN agent)) (VP (VBD felt) (ADVP (RB strongly)) (SBAR (IN that) (S (NP (NP (DT the) (NN situation)) (PP (IN in) (NP (NNP Washington)))) (VP (VBD was) (ADJP (RB too) (JJ unstable) (PP (IN for) (NP (DT the) (NNP President)))) (S (VP (TO to) (VP (VB return) (ADVP (RB there)))))))))) (, ,) (CC and) (S (NP (NNP Card)) (VP (VBD agreed))) (. .)))
It was too dangerous for the President to return to Washington.
( It ( ( ( was ( too ( dangerous ( for ( the President ) ) ) ) ) ( to ( return ( to Washington ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (ADJP (RB too) (JJ dangerous) (PP (IN for) (NP (DT the) (NNP President)))) (S (VP (TO to) (VP (VB return) (PP (TO to) (NP (NNP Washington))))))) (. .)))