He had desired and sought the Republican nomination in 1864, and though the overwhelming sentiment for Mr.Lincoln had soon driven him from the field, the differences he had encouraged led to his retirement from the Cabinet.

His elevation to the highest judicial office in the land did not subdue or even check his political aspirations.

For a time he looked forward with hope to the Republican nomination in 1868; but when it became evident that none but General Grant could be the chosen leader, his thoughts evidently turned towards the Democratic Convention.
Certain circumstances made the possible selection of the Chief Justice as the Democratic candidate a less inconsistent procedure than his long antagonism to the party might at first suggest.

In the beginning of his political career Judge Chase had leaned towards the Democratic party, and at a more recent period had been promoted to the Senate by the aid of Democrats.

He had consistently advocated the fundamental principles which originally distinguished the party.