Why did the northerners in congress accept California application for statehood while southerners reject it?

California's application for statehood was initially accepted by a Senate vote in 1850. However, the issue became entangled in the larger political controversy over the expansion of slavery into new territories. The Compromise of 1850, which attempted to resolve this conflict, temporarily averted a sectional crisis and led to California's admission to the union as a free state.

Here's a more detailed look at the reasons behind the different positions on California's statehood:

Northern Support:

1. Economic interests: Many northerners saw the potential economic benefits of California's vast resources, including gold, agriculture, and trade opportunities.

2. Free Soil Movement: The Free Soil Party, a political movement opposed to the expansion of slavery into new territories, supported California's admission as a free state to counterbalance the number of slave states.

3. Sectional Balance: The admission of California as a free state would help maintain the balance between free and slave states in the Senate.

Southern Rejection:

1. Preservation of Slavery: Southerners were concerned that the admission of California as a free state would further erode their political power and reduce their ability to protect the institution of slavery.

2. States' Rights: Some southerners argued that the federal government overstepped its authority by admitting California without the consent of all existing states, challenging the principle of states' rights.

3. Economic Competition: Some southern states feared that the development of California and the influx of new settlers would divert economic resources and growth away from the South.

4. Fear of Northern Dominance: Southerners worried that a growing free state population would lead to increased political influence for the North and ultimately endanger the institution of slavery.

It is important to note that positions on California's statehood were influenced by broader ideological and political considerations. The issue became a focal point for the intensifying sectional conflict between pro-slavery and anti-slavery forces, eventually contributing to the outbreak of the American Civil War in 1861.