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|United States Senator|
March 4, 1871 – March 24, 1873
|Preceded by||Edmund G. Ross|
|Succeeded by||Robert Crozier|
|Born||March 1, 1830|
Drakes Ferry, Pennsylvania, U.S.
|Died||May 19, 1917 (aged 87)|
Kansas City, Missouri, U.S.
Born in Drakes Ferry, Pennsylvania, he attended public schools, and in 1847 enlisted as a private to serve in the Mexican–American War. He moved to Columbia, Pennsylvania, in 1848, where he was employed in a bank and subsequently went into business for himself.
He then moved to Leavenworth, Kansas, in 1861 and engaged in the transportation of military supplies to the various posts on the plains. He then worked building railroads, especially the Missouri River and Kansas Central Railroad.
Caldwell was elected as a Republican to the U.S. Senate and had served just two years, from March 4, 1871, to March 24, 1873, when he resigned in the face of a movement to expel him for bribery and corruption. It was claimed that he had bribed his political opponents not to run, leaving the field clear for himself.
From 1877 to 1897, he manufactured wagons and carriages, and from 1897 to 1915 he was president of the First National Bank of Leavenworth. In the 1880s, Caldwell was the president of the Idaho and Oregon Land Improvement Company, which purchased acreage next to the tracks of the Oregon Short Line Railroad. The city of Caldwell in southwestern Idaho is named after him.
Caldwell died in Kansas City, Missouri in 1917, and is interred at Mount Muncie Cemetery in Leavenworth, Kansas.
- Grossman, Mark; Political corruption in America: an encyclopedia of scandals, power, and greed, ABC-CLIO, 2003 ISBN 1-57607-060-3. p. 44
- "U.S. Senate: The Election Case of Samuel C. Pomeroy and Alexander Caldwell of Kansas (1873)".
- "A Brief History of Caldwell, Idaho". Caldwell Chamber of Commerce. Archived from the original on September 4, 2012. Retrieved June 25, 2013.
- Idaho for the Curious, by Cort Conley, 1982, ISBN 0-9603566-3-0, p.387