DES MOINES, Iowa - Sen. Hillary Clinton, unbowed by a third-place finish in the Iowa Democratic caucuses, hailed a "great night for Democrats" and said the strong turnout pointed for sure to the election of a Democratic president in November. She said she would "keep pushing as hard as we can." The former first lady, who had once held a commanding lead in polls here, congratulated caucus winner Sen. Barack Obama and the second-place finisher, former Sen. John Edwards. She promised cheering supporters she would take "this enthusiasm and go tonight to New Hampshire." The state holds its primary on...