And diplomatic efforts are still going nowhere. Presidents Obama and Putin talking past each other on an hour-long phone call. The U.S. criticizing next weekend's scheduled vote here to decide if Crimea should break off and join Russia.
JOHN KERRY, SECRETARY OF STATE: Crimea is Ukraine. We support the territorial integrity of Ukraine.
MARQUARDT: As Crimea prepares for next Sunday's referendum, this mostly Russian region is showing where its allegiances lie.
(on camera): So what kind of passport would you like?
UNIDENTIFIED FEMALE: Russian. I hate Ukrainian.
MARQUARDT (voice-over): As this mostly Russian region prepares for next Sunday's referendum, there are a growing number of rallies for and against joining Russia.
But that feeling is far from universal. We visited a small village of the historically persecuted Tartar community, now terrified of a Russian takeover.
Even many Russian Crimeans, like this couple, want to see Ukraine work out its own problems.
UNIDENTIFIED FEMALE: There are some international laws, you know. And we should follow them, but not with these, you know, Russian troops present here, because we can do it ourselves.
UNIDENTIFIED MALE: It's time for politicians, not just from Ukraine and Russia, from all the world, to solve this one, because if you let Putin know to take Crimea, then maybe some other parts of Ukraine.
Who knows who is next?
MARQUARDT: But for now, a diplomatic solution is just a faint hope. Russia is refusing to speak with the Ukrainian government, calling them puppets of extremists. Instead, Russia is letting these troops do all the talking for them -- Martha.
RADDATZ: Thanks to Alex.
Chairman Mike Rogers is back with us now. Chairman Rogers, if you will, take a bigger look. Look at the whole area of Ukraine and tell us why should Americans be concerned about what's going on there?
ROGERS: Well, any instability in that region causes economic instability and certainly will impact Europe. If it impacts Europe's economy, it's going to impact the United States economy.
You know, when this first happened, Martha, there was a dip in our stock exchange, our markets.
So I think they went down 154 points.
So it has a direct relationship. We're no longer, you know, completely isolated by the two oceans around the United States. We're interconnected economically.
And so we do need to worry about the stability of a place like the Ukraine and we need to worry about the continued advancement, certainly, for reasons of influence or, in this case, taking land, by the -- by Putin and Russia.
We've seen this story before. And when we didn't react, as the United States, we thought it would settle itself, we ended up buying into bigger trouble later. And I think that's what you're seeing happening.
And at least some notion that we have to diplomatically apply pressure and get our European allies together to start pushing back on what I think is an expansionist attitude by Putin.
RADDATZ: But what if this referendum for secession passes?
Then what do we do?
What does Europe do?
I know the Ukrainian government has to be involved. They say it's illegal. We say it's illegal.
But what happens next?
ROGERS: Well, it gets a little interesting. So you'll have two sets of problems. On the diplomatic front, you'll have what does Europe do?