Passage: Lincoln's declared philosophy on court nominations was that "we cannot ask a man what he will do, and if we should, and he should answer us, we should despise him for it. Therefore we must take a man whose opinions are known." Lincoln made five appointments to the United States Supreme Court. Noah Haynes Swayne was chosen as an anti-slavery lawyer who was committed to the Union. Samuel Freeman Miller, supported Lincoln in the 1860 election and was an avowed abolitionist. David Davis was Lincoln's campaign manager in 1860 and had served as a judge in Lincoln's Illinois court circuit. Democrat Stephen Johnson Field, a previous California Supreme Court justice, provided geographic and political balance. Finally, Lincoln's Treasury Secretary, Salmon P. Chase, became Chief Justice. Lincoln believed Chase was an able jurist, would support Reconstruction legislation, and that his appointment united the Republican Party.

Question: Who did Lincoln believe would unite the Republican Party with his appointment?
Chase