A CABINET CRISIS.—RESIGNATION OF WILLIAM DENNISON, POSTMASTER-GENERAL, JAMES SPEED, ATTORNEY-GENERAL, AND JAMES HARLAN, SECRETARY OF THE INTERIOR.—SUCCEEDED RESPECTIVELY BY ALEXANDER W. RANDALL, HENRY STANBURY, AND ORVILLE H. BROWNING.—POLITICAL CAMPAIGN OF 1866.—FOUR NATIONAL CONVENTIONS.—TWO FAVORING THE PRESIDENT; TWO ADVERSE.— PHILADELPHIA CONVENTION, AUGUST 14, FAVORING THE PRESIDENT.—IMPRESSIVE IN NUMBERS, DISTINGUISHED IN DELEGATES.—PHILADELPHIA CONVENTION OF SEPTEMBER 13.—SOUTHERN LOYALISTS AND NORTHERN SYMPATHIZERS.—LIST OF PROMINENT MEN IN ATTENDANCE.—MARKED EFFECT OF ITS PROCEEDINGS.— SPEECH OF HONORABLE JAMES SPEED.—ADDRESS TO THE PEOPLE.—WRITTEN BY THE HONORABLE J. A. J. CRESWELL.—SOLDIERS' CONVENTION AT CLEVELAND.— FAVORABLE TO THE PRESIDENT.—SPEECH OF GENERAL EWING.—CONVENTION PRINCIPALLY DEMOCRATIC IN MEMBERSHIP.—ITS PROCEEDINGS INEFFECTIVE.— SOLDIERS' CONVENTION AT PITTSBURG.—HOSTILE TO PRESIDENT.—GENERAL COX PRESIDES.—DISTINGUISHED OFFICERS PRESENT.—TWENTY-FIVE THOUSAND SOLDIERS PRESENT.—GREAT EFFECT FOLLOWED IT IN THE COUNTRY.—FOURTEENTH AMENDMENT THE RALLYING-POINT.—POLITICAL EVENTS OF THE SUMMER.—HOSTILE TO PRESIDENT.—NEW-ORLEANS RIOT OF JULY 30.—GREAT SLAUGHTER.—REBEL OFFICERS IN LOUISIANA RESPONSIBLE.—INVESTIGATED BY CONGRESS.—ALSO BY MILITARY AUTHORITIES.—REPORTS SUBSTANTIALLY AGREE.—CENSURE OF THE PRESIDENT.—RESULT HURTFUL TO HIS ADMINISTRATION.—HIS FAMOUS TOUR.— INJURIOUS TO HIS ADMINISTRATION.—REPUBLICANS VICTORIOUS IN ELECTIONS THROUGHOUT THE NORTH.—DEMOCRATS VICTORIOUS THROUGHOUT THE SOUTH.— HOUSE OF REPRESENTATIVES REPUBLICAN BY THREE TO ONE.—PRESIDENT DEPRESSED.—IMPORTANCE OF THE ELECTIONS OF 1866.—NEGRO SUFFRAGE.—THE DIFFICULTY OF IMPOSING IT ON THE SOUTH.—FOURTEENTH AMENDMENT THE TEST FOR RECONSTRUCTION.