Answer:
'Known know party' was another name for the anti-immigrant American Party.
'Millard Fillmore' is the name of the US senator from New York who refused the Republican nomination for presidency in 1856
Explanation:
The Native American party also is known by the names Known know party, Anti-Immigrant American party anti-catholic group was formed in the 1840s in response to increasing Immigration from Ireland and Germany.
This party came out as a secret society organized to oppose the Immigration. later organized as the American party but soon disappeared after 1856 elections.
The known know party divide their vote between president Millard Fillmore and Fremont, the democrats nominated James Buchanan who won the election
