two long-time members of congress -- tom davis, martin frost, co-authors along with longtime political reporter rich cohen, of this book, "the partisan divide -- congress in crisis." en of this book, "the partisan divide -- congress in crisis." in your book gentlemen -- "either of us might have become speaker of the house, but our parties move away from us." how so? guest: well, we were both political moderates. tom was a leader in the republican party, so much so that when he wanted to run forces conspired to prevent him from getting the nomination. that speaks for himself. i was in congress for 28 years. i was a moderate democrat from a southern state, and then as now what my party is. the parties have changed. democratic party has become a more liberal party.