The Hillary Clinton Juggernaut: What she'll need to win White House

After Hillary Clinton left the State Department in early 2013, her favorable rating was 64% and her unfavorable rating 31% in an April 14 Gallup poll. In a March 4, 2015, Gallup poll, respondents were 50% favorable, 39% unfavorable. That’s not a good trend.

Nevertheless, the Hillary Juggernaut rolls on. She has no significant challenger for the 2016 presidential nomination—though 66% of Democrats in a March 24 CBS poll wanted Mrs. Clinton to face one.

Her campaign strengths are clear. Raising money, at least from bundlers and events, will be easy. President Obama is in her corner—he needs her to win to protect his legacy. And finally there’s her team. It consists of mostly battle-hardened veterans with a take-no-prisoners toughness, a mix of Obama operatives, key State Department advisers, members of her 2008 campaign apparatus, and some of her husband’s old hands from the 1990s.

Yet each one of these strengths is also a potential weakness.

To continue reading Karl Rove's column in the Wall Street Journal, click here.