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Various experts have explained how Vietnam can be smarter, greener, and more efficient in its digital overhaul, with an eye towards sustainability.

They didn't see how hard the fight would be on the right after she had won the nomination, but all the things -- all the forces in play there at the end of 2015 and through the primary, early primary season of 2016 are even more so in play now, now that -- >> we're seeing that with some incumbent democrats facing primary challenges. nbc news has a new story up about that. many of them have never been challenged before. in the messaging session that the candidates got at that progressive training, a lot of it was about their personal stories, about authenticity, but also about economic realitie...

>> traditional democrat. progressive democrats. how hard is that to walk that line? >> i think it is challenging. you know, but, again, we can all come together when we want to do what's right. >> reporter: that's exactly the message in washington. >> there is absolutely a division in the democratic party. >> reporter: to people who say organizations like this divide the democratic party. they hurt the cause. >> we think the majority of the country our polling shows supports medicare for all, supporting higher wages, expanding social security. our candidates are speaking to that. >> reporter: ...

Mentions someone's eyeshadow in a joke and that's what the outrage is about? an outrage gap and i don't understand why we're focused on michelle wolf's comments and not on the president of the united states' every single day. >> david, rick, anne, thank you to you all. going to the white house rose garden now where president trump will take questions with the president of nigeria any minute now. nbc's chief white house correspondent hallie jackson is live there. hallie, tell us a little what we think the president and the nigerian president have been talking about, and then maybe a little bit ...

Case of the larger progressive argument on the democratic side as well. i mean, as rick was just making the conservatives art against the mushy middle, the progressive democrats are making that argument against a mushy middle for 2020, and how well both of these candidates do in ohio will be a bit of a harbinger for that. >> david, ask you quickly. a lot of controversy. you may have heard something about this at the white house correspondents' dinner and whether the comedic approach was appropriate. you want to weigh in on that? >> yeah. i mean, i watched the white house correspondents' dinner...