'This Week' Transcript: Sen. Claire McCaskill

— -- Below is the rush transcript for "This Week" on April 12, 2015. It may contain errors and will be updated.

ANNOUNCER: Now on ABC's THIS WEEK, Hillary re-groove -- Hillary Clinton reveals a brand new strategy on the campaign trail.

But will it work?

Plus, the latest on her next big stop, just hours away in New Hampshire.

GOP summit -- Republican hopefuls already swarming The Granite State.

So which contender can break out of the pack?

And the surprising clashes on the trail -- shocking security threats -- how that mailman's bizarre stunt buzzing over tourists at the Capitol, could signal a serious new danger to the homeland.

And inside the White House -- the secrets behind the doors of America's most famous address revealed by the staff that has seen it all.

From ABC News, THIS WEEK WITH GEORGE STEPHANOPOULOS begins now.

MARTHA RADDATZ, GUEST HOST: Good morning.

I'm Martha Raddatz.

And we start off with breaking news.

A massive rescue operation underway right now in the Mediterranean Sea. A boat capsizing. Up to 700 people on board fleeing the chaos in Libya.

ABC's Alex Marquardt is tracking it for us -- good morning, Alex.

ALEX MARQUARDT, ABC NEWS CORRESPONDENT: Good morning, Martha.

This could turn out to be the deadliest disaster in the Mediterranean Sea. A United Nations official this morning already calling it one of the greatest tragedies.

Italy and Malta have now launched a major rescue operation around 60 miles off the coast of Libya, where this small boat capsized, with up to 700 migrants on board, most of them now feared dead.

So far, just 28 people have been found alive.

In the past week alone, more than 10,000 migrants have been rescued trying to make this treacherous journey from Africa to Europe. But hundreds more have drowned.

And this morning at Sunday mass, Pope Francis called on the international community to take action -- Martha.

RADDATZ: Our thanks to Alex.

Now to 2016 and Hillary Clinton's campaign kick-off. She hit Iowa with a new campaign strategy and now we're getting new details about her upcoming visit to the key state of New Hampshire.

ABC's Cecilia Vega is on the Clinton beat for us -- good morning, Cecilia.

CECILIA VEGA, ABC CORRESPONDENT: Martha, good morning to you.

That's right, next stop New Hampshire. Her campaign is really pushing hard to make this not look like a done deal. Her new strategy, an accessible, humble Hillary Clinton.

But will voters buy it?

(BEGIN VIDEOTAPE)

HILLARY RODHAM CLINTON, FORMER SECRETARY OF STATE: Hi.

How are you all?

UNIDENTIFIED FEMALE: How are you?

CLINTON: How are you?

VEGA (voice-over): This is Hillary Clinton 2.0...

CLINTON: I'll try both your chai and your Carmelo (ph) and maybe a glass of water, too.

VEGA: From coffee shops to Chipotle, a candidate launching her presidential bid with a road trip?

CLINTON: I want to know what I can do.

VEGA: With one failed run for the White House in the rear-view mirror, this time in Iowa, Christie is trying something new -- no helicopters or giant rallies...

CLINTON: And I'm in it to win it.

VEGA: -- it's all about the Scooby van and one-on-one with everyday Iowans, meetings that so far have been heavy on handshakes and light on policy.

Today in Hillary-land, humility is the buzzword...

(on camera): Is this lessons learned from '07?

UNIDENTIFIED FEMALE: I guess in some ways, you know, your whole life is lessons learned. So she -- this is how she's decided she wants to -- that she wants to do this.