Here are the 3 stories I've seen for why the USD is lower early in the week here

1. Trump lost the Healthcare vote on Friday. Well, it didn't even get to the vote ... what a mess.

2. Trump blamed and taunted Republican leaders over the weekend on Twitter:

What a mess, part 2.

3. Merkel showed how its done, German Chancellor Merkel's conservatives won a regional election - big boost

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So, there are 3 narratives - take your pick. And I'm open to any more anyone might want to post.