Answer: Following Texas' successful war of independence against Mexico in 1836, President Martin van Buren refrained from annexing Texas after the Mexicans threatened war. ... His efforts culminated on April 12 in a Treaty of Annexation, an event that caused Mexico to sever diplomatic relations with United States. Polk defeated Whig Henry Clay in a close contest turning on the controversial issues of slavery and the annexation of the Republic of Texas. President John Tyler's pursuit of Texas annexation threatened the unity of both major parties.
They moved into Alaska during an Ice Age when there was ice from Eastern Asia and they walked to Alaska
Checks and balances. Each branch “checks” the power of the other branches to make sure that the power is balanced between them.
