Wow, I typed an unique for an! essay and then Word grammar check said it was wrong. But I always thought that the rule was: an = when a word starts with a,e,i,o,u. But then I figured, yeah it does sound strange.
Buchanan was nominated by the Democratic Party in the 1856 presidential election. Throughout most of Pierce's term, he had been stationed in London as a minister to the Court of St. James's, so was not caught up in the crossfire of sectional politics that dominated the country.
Another faction nominated former Speaker of the House John Bell, who took no position on slavery; his only focus was on saving the Union. The remainder of the party finally nominated Buchanan's archenemy, Stephen Douglas. For his part, President Buchanan supported Breckinridge's candidacy.