1846 United States elections

Elections occurred in the middle of Democratic President James Polk's term, during the Second Party System. The election took place during the Mexican–American War. Members of the 30th United States Congress were chosen in this election. Wisconsin joined the union during the 30th Congress. Democrats kept control of the Senate, but lost control of the House.

1846 United States elections

← 1844          1845          1846          1847          1848 → Midterm elections
Incumbent president	James K. Polk (Democratic)
Next Congress	30th
Senate elections
Overall control	Democratic hold
Seats contested	19 of 58 seats[1]
Net seat change	Democratic +2[2]
House elections
Overall control	Whig gain
Seats contested	All 230 voting seats
Net seat change	Whig +37[2]

In the House, the Whigs won major gains, turning a dominant Democratic majority into a narrow Whig majority.^[3]

In the Senate, Democrats picked up a moderate number of seats, building on their majority.^[4]

See also

• 1846–47 United States House of Representatives elections
• 1846–47 United States Senate elections