Question: what important events happened during james k polk's presidency?
Answer: Irish Potato Famine. The great Irish potato famine forces huge waves of starving immigrants to the United States, sparking anti-Catholic, nativist backlashes.
June 25, 1845. Discouraging Mexican invasion. ... 
July 1, 1845. "Manifest Destiny" ... 
October 10, 1845. ... 
December 29, 1845. ... 
February 4, 1846. ... 
May 13, 1846. ... 
June 14, 1846.