All five presidential candidates are campaigning in Wisconsin ahead of next week's primary there.
- Donald Trump's campaign manager, Corey Lewandowski, is charged with battery after an encounter with a reporter this month
- Rivals of Trump assail his campaign as "abusive"
- Wisconsin Gov. Scott Walker backs Sen. Ted Cruz in the latest bid to stop Trump from winning the Republican presidential nomination
- Sen. Bernie Sanders hasn't pushed Hillary Clinton as far left as you might think
- President Obama expresses dismay over candidates' "vulgar rhetoric"