Explain how changing demographics led to president Obama’s reelection in 2012.

WASHINGTON, Sep 25 2012 (IPS) - With just six weeks left before the U.S. presidential polls, analysts on Tuesday suggested that recent demographic changes in the United States, particularly through immigration, have made it more difficult than ever for a Republican candidate to vie for president.

The current challenger, Mitt Romney, does not appear to be making up nearly enough lost ground to take the election.

According to some scholars and poll-watchers, the trend is not only complicating Republican hopes for the 2012 polls, but could continue to do so in coming years unless the party undertakes a significant reappraisal of its social and economic policy approaches.

Romney now needs “outlandishly large margins to be competitive – and he’s not anywhere close”, Ruy Teixeira, a senior fellow at the left-leaning Center for American Progress, said Tuesday, unveiling a new report.WASHINGTON, Sep 25 2012 (IPS) - With just six weeks left before the U.S. presidential polls, analysts on Tuesday suggested that recent demographic changes in the United States, particularly through immigration, have made it more difficult than ever for a Republican candidate to vie for president.

The current challenger, Mitt Romney, does not appear to be making up nearly enough lost ground to take the election.

According to some scholars and poll-watchers, the trend is not only complicating Republican hopes for the 2012 polls, but could continue to do so in coming years unless the party undertakes a significant reappraisal of its social and economic policy approaches.

Romney now needs “outlandishly large margins to be competitive – and he’s not anywhere close”, Ruy Teixeira, a senior fellow at the left-leaning Center for American Progress, said Tuesday, unveiling a new report.

Explanation:

answer: secession

secession, as it applies to the outbreak of the american civil war, comprises the series of events that began on december 20, 1860, and extended through june 8 of the next year when eleven states in the lower and upper south severed their ties with the union. the first seven seceding states of the lower south set up a provisional government at montgomery, alabama. after hostilities began at fort sumter in charleston harbor on april 12, 1861, the border states of virginia, arkansas, tennessee, and north carolina joined the new government, which then moved its capital to richmond, virginia. the union was thus divided approximately on geographic lines. twenty-one northern and border states retained the style and title of the united states, while the eleven slave states adopted the nomenclature of the confederate states of america.

explanation:

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;