Changes

* In 1840, the first anti-slavery party (called the "Liberty Party") formed.  It lasted until 1848, when it merged with opponents of slavery in the Whig and Democratic Parties in order to form another anti-slavery party, the stronger Free-Soil party.

* In 1840, the first anti-slavery party (called the "Liberty Party") formed.  It lasted until 1848, when it merged with opponents of slavery in the Whig and Democratic Parties in order to form another anti-slavery party, the stronger Free-Soil party.

* In 1842, the union workers' movement obtained a key court ruling in their favor from the Massachusetts Supreme Court, in ''Commonwealth v. Hunt''.  That decision held that it was legal for workers to organize a union and to strike. Union power was greatly increased by this ability to strike (and shut down a factory) when the employer does not give into union demands.  Some blame the collapse of the American automobile industry today and the current depression in Michigan on an abuse by unions of their great power.

* In 1842, the union workers' movement obtained a key court ruling in their favor from the Massachusetts Supreme Court, in ''[[Commonwealth v. Hunt]]''.  That decision held that it was legal for workers to organize a union and to strike. Union power was greatly increased by this ability to strike (and shut down a factory) when the employer does not give into union demands.  Some blame the collapse of the American automobile industry today and the current depression in Michigan on an abuse by unions of their great power.

==James K. Polk and War with Mexico==

==James K. Polk and War with Mexico==