Mayor of Philadelphia from 1828 to 1829 who was the eleventh Vice President of the United States from 1845 to 1849, under President
Elected on the same ticket as Polk, he acted in the Senate to cast the tie-breaking vote to overturn a protective tariff.
The county of Dallas, in Texas - as well as Dallas counties in Iowa and Missouri - were named after him.
His father Alexander Dallas was Secretary of the Treasury under President
He had a longtime rivalry with James Buchanan, from his days in Philadelphia government to the administration of James K. Polk.