It also would have been better with more space on the right.
I really like the one of the dog, surroundings is a little distracting but its not too bad.
Agreed. Keep in mind if the duck and been facing to the left it would have been fine. In most cases the eye is drawn in the direction that the subject is facing so generally you don't want to cut the photo off on the right if the subject is facing right etc.
So on that one should I have just moved like an inch to the right to get the Lincoln Memorial all the way to the left in the picture? Or should I have cut off the Memorial to give even more space on the right?