Answer: They joined the Confederacy and the Union.
The Civil War (Which was in 1861) there were thousands of Mexicans living in California, Texas.
There were not enough paid workers arriving from Europe quick enough to meet the demand, so they turned towards slave labor. A
Which Roosevelt? There is Franklin Roosevelt and Theodore Roosevelt
Midterm elections usually have the characteristic of lower voter turnout than Presidential year elections.
People usually feel less motivated and, as a result, less people vote during what is considered "off years." As a result, there is often more movement in who holds the House or Senate as a result of only die hard voters participating in the off year.