1
It's finally 2016 and Iowa votes less than a month from now, with New Hampshire on its heels. While Hillary Clinton campaigns in Iowa, Bill Clinton makes his solo campaign debut in New Hampshire, not far from where Donald J. Trump, who has been attacking the former president's sexual history, will hold a rally later. Ted Cruz, who is hoping for a big win in Iowa, tries to be everywhere with a six-day bus tour of 28 towns there.
2
Will attack ads still have the force they did in past campaigns? We're about to find out. For his part, Mr. Trump's first TV ad focuses on the dangers of immigration. Check out what other questions could shape the race.
3
Elsewhere on the trail: John Kasich and Marco Rubio are in Iowa and New Hampshire; Bernie Sanders, Chris Christie and Carly Fiorina are in New Hampshire; and Mike Huckabee is in Iowa.
4
We examine Mr. Sanders's ground game In Iowa and what's at stake for Mrs. Clinton there.
5
Over the weekend: Republican candidates reacted strongly to President Obama's coming action on guns, and Mr. Trump shrugged off his appearance in a terrorist video.
What’s Happening Next
Jan. 14
Republican Debate in North Charleston, S.C.
Jan. 17
Democratic Debate in Charleston, S.C.
Election Guide
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