Decision 2012: Romney takes Arizona, narrowly wins Michigan

Republican frontrunner Mitt Romney won the Arizona presidential primary by a decisive 20 percentage points over his chief rival Rick Santorum. But in his native state of Michigan, he slipped by with a margin of 3 percentage points. While Romney crowed about his wins, Santorum claimed a moral victory by making the race competitive. After the speeches, the GOP candidates immediately began campaigning hard for this week's "Super Tuesday" vote.

Class discussion: After last week's elections, a senior Romney campaign aide said his candidate won a "delegate landslide." Did he? Find news reports about how many Republican convention delegates each candidate won in Arizona and Michigan. How many total delegates does each candidate have? How many delegates does a candidate need to win the GOP presidential nomination? How many delegates are at stake in this week's "Super Tuesday" voting? What would happen if no single candidate won enough delegates before the Republican convention?