That was taken from Westphalian's original post that I included. My response, which was in bold type, stated that colonial transfer was perfectly acceptable.
Yes, my fault.
I was rather sure that most descriptions of "Manifest Destiny" encompassed all of North America, and thus also Alaska. While typing, I first wrote it down as MD and a brainfart morphed that later into Monroe Doctrine when I decided to expand the abbreviation. Because it might be misleading.
*sigh*
And many thanks for everyone who confirmed that Prussia's goal during the 1860s was not mindless expansion into every place possible.