Question: The 3852 Democratic National Convention nominated Franklin Pierce over what American military officer who represented Michigan in the United States Senate?

Context paragraphs:
1852 Democratic National Convention: The 1852 Democratic National Convention nominated the dark horse candidate Franklin Pierce for President on the 49th ballot, passing over better known candidates Lewis Cass of Michigan (the previous nominee in 1848), James Buchanan of Pennsylvania, and Stephen A. Douglas of Illinois.  It was held at the Maryland Institute in the eastern downtown business district of Baltimore, Maryland, just two weeks before the opposing Whig Party met in the same hall for their nominating convention.

1932 Democratic National Convention: The 1932 Democratic National Convention was held in Chicago, Illinois June 27 – July 2, 1932.  The convention resulted in the nomination of Governor Franklin D. Roosevelt of New York for President and Speaker of the House John N. Garner from Texas for Vice President.  Beulah Rebecca Hooks Hannah Tingley was a member of the Democratic National Committee and Chair of the Democratic Party of Florida.  She seconded the nomination of Franklin Delano Roosevelt, becoming the first woman to address a Democratic National Convention.

Democratic National Convention: The Democratic National Convention (DNC) is a series of presidential nominating conventions held every four years since 1832 by the United States Democratic Party.  They have been administered by the Democratic National Committee since the 1852 national convention.  The primary goal of the Democratic National Convention is to nominate and confirm a candidate for president and vice president, adopt a comprehensive party platform and unify the party.

Lewis Cass: Lewis Cass (October 9, 1782June 17, 1866) was an American military officer, politician, and statesman.  He represented Michigan in the United States Senate and served in the Cabinet of Andrew Jackson and James Buchanan.  He was also the 1848 Democratic presidential nominee and a leading spokesman for the Doctrine of Popular Sovereignty, which held that the people in each territory should decide whether to permit slavery.

1856 Democratic National Convention: The 1856 Democratic National Convention was the seventh political convention of the United States Democratic Party.  Held from June 2 to June 6, 1856, prior to the November elections, at Smith & Nixon's Hall in Cincinnati, on the Ohio River in Ohio, it was the first national party nominating convention outside the original thirteen states.  The party nominated James Buchanan, U.S. Ambassador to Great Britain, for President (denying re-nomination to incumbent President Franklin Pierce), and former Representative John C. Breckinridge of Kentucky for Vice President.

1976 Democratic National Convention: The 1976 Democratic National Convention met at Madison Square Garden in New York City, from July 12 to July 15, 1976.  The assembled United States Democratic Party delegates at the convention nominated former Governor Jimmy Carter of Georgia for President and Senator Walter Mondale of Minnesota for Vice President.  John Glenn and Barbara Jordan gave the keynote addresses.  Jordan's keynote address made her the first African-American woman to deliver the keynote address at a Democratic National Convention.  It was listed as #5 in American Rhetoric's Top 100 Speeches of the 20th Century (listed by rank).  The convention was the first in New York City since the 103-ballot 1924 convention.

2000 Democratic National Convention: The 2000 Democratic National Convention was a quadrennial presidential nominating convention for the Democratic Party.  The convention nominated Vice President Al Gore for President and Senator Joe Lieberman from Connecticut for Vice President.  The convention was held at the Staples Center in Los Angeles, California from August 14 to August 17, 2000.  Gore accepted the presidential nomination on August 17, the final night of the convention.  This was the second Democratic National Convention hosted by Los Angeles, the first being in 1960.

2008 Democratic National Convention: The United States 2008 Democratic National Convention was a quadrennial presidential nominating convention of the Democratic Party where it adopted its national platform and officially nominated its candidates for President and Vice President.  The convention was held in Denver, Colorado, from August 25 to August 28, 2008, at Pepsi Center.  Senator Barack Obama from Illinois gave his acceptance speech on August 28 at Invesco Field in what the party called an "Open Convention".  Denver last hosted the Democratic National Convention in 1908.  Obama became the party's first African-American nominee for President.  Senator Joe Biden from Delaware was nominated for Vice President.

1860 Democratic National Conventions: The three 1860 Democratic National Conventions were crucial events in the lead-up to the American Civil War.  The first Democratic national convention adjourned in deadlock without choosing candidates for President and Vice President.  A second official convention nominated Senator Stephen A. Douglas of Illinois for President and former Senator Herschel V. Johnson of Georgia for Vice President.  A third, “rump,” convention, primarily Southerners, nominated Vice President John C. Breckinridge for President and Senator Joseph Lane of Oregon for Vice President.

Presidency of Franklin Pierce: The presidency of Franklin Pierce began on March 4, 1853, when Franklin Pierce was inaugurated as President of the United States, and ended on March 4, 1857.  Pierce, a Democrat from New Hampshire, took office as the 14th United States president after routing Whig Party nominee Winfield Scott in the 1852 presidential election.  Seen by fellow Democrats as pleasant and accommodating to all the party's factions, Pierce, then a little-known politician, won the presidential nomination on the 49th ballot of the 1852 Democratic National Convention.

Supporting paragraphs: 1852 Democratic National Convention Lewis Cass
Answer: Lewis Cass