How did the war with Mexico and the California gold rush affect the slavery issue in the US?

The reason why California becoming a state was an issue was of the debate over slavery, the south wanted slaves in California and the west was against slavery

Slavery was outlawed in the territories that was ceded by Mexico. The territory became what is now the states of New Mexico and Arizona.

slavery in the territory acquired from Mexico

the issue of slavery became important again in 1850. At that time, california requested to join the union as a free state.

The issue, matter of, is that slavery remain unsettled for many years to come.

The slavery issue caused the northern and southern democratics to split up and have two different democratic parties.

In 1848, the Democrats needed new guy, decided on General Lewis Cass, an 1812 veteran. Slavery was outlawed in the territories that was ceded by Mexico.

It gave Lincoln the credibility to issue the Emancipaiton Proclamation.

It would have banned slavery in any territory gained from Mexico and further divided the North and South over the slavery issue.

Initially, the Wilmot Proviso (1846) prevented slavery on territories acquired from Mexico. Ultimately, it was decided through the American Civil War (1861 - 1865).

It was of course the issue of slavery that could not be ignored. Texas had declared itself Independent from Mexico over this issue and had shown a willingness to fight to keep slavery as a part of the Republic of Texas. This was the issue that would not go away.

Popular sovereignty was the right of the residents of these territories to vote themselves on the issue of slavery (in this case). In the Compromise of 1850, the territories of New Mexico and Utah were granted popular sovereignty to decide for themselves if slavery should be allowed or not in these areas.

Calfornia extended so far either side of the Missouri line (North of which slavery was illegal) that it rendered the Missouri Compromise unworkable, so a new one had to be worked out. It was a patched-up deal, and it did not last.

The acquisition of the whole states of California, Nevada, Utah, Arizona, New Mexico and Texas, as well as parts of Wyoming, Colorado, Oklahoma and Kansas. Renewing the slavery issue on gained territories. Ultimately, the American Civil War (1861-1865).

because it made a major problem and started the civil war

No it was not an issue their!

The compromise of 1850

The fear that slavery would spread into new territories

The issue of expansion of slavery was its expansion and growth into Western territories.

The South looked at slavery as an economic issue. The North viewed slavery as a moral issue. In the North, slavery was proving to be unprofitable in the North and was dying out by the end of the American Revolution, but in the South white Southerners were increasingly more defensive of slavery.

the issue of slavery is so wrong and causes disgust in many

Yes, the civil war was started on the issue of slavery.

Yes slavery was and still is an issue in many countries (both legal and illegal).

Slavery probably did not play a major role in the War with Mexico. After Mexico lost the Texas War of Independence, she built up a much better trained and more powerful army. When a Mexican Army crossed the Rio Grand River and started the war, the English observers though Mexico would win the war. At the Battle of Buena Vista outside of Monterrey, the Mexicans probably would have prevailed the next day. Instead, a coup d'etat occurred in Mexico city. Santa Anna withdrew his troops. The Battle of Vera Cruz was the only real battle that occurred when the Americans landed. They kept performing maneuvers to get between the Mexican army and Mexico City. Mexico city fell without a fight. While slavery was not an issue as a cause of the war and was not an issue during the war, it was an issue after the war. The United States had the option of drawing its southern border anywhere it chose. When the commissioner realized that slavery was not feasible south of Texas, he kept the border of Texas where it was. So slavery played a role after the war ended. Since California and Utah had fought on the side of the United States, he took them into the United States.

Admitting California into the Union in 1850 gave raise over the debate over slavery. It was against Federal law of the confederacy to harbor slaves in free states.