If I remember correctly, Monroe doctrine is bashed as unashamedly US imperialist in places like Cambridge University history courses on US history.
And some of the classic final year research dissertation titles for Cambridge students reading (i.e. studying) US History are
1) Political Identities of American Exiles to New Brunswick, c. 1782-c.1812
2) Crime and the Entertainment Industry in Chicago, 1921-1933
3) Nixon, the Christmas Bombing and the Paris Peace Accords, 1972-73
4) The Experience of Japanese Americans during the Civil Rights Movement
5) The Suburban Critique and the American New Towns Movement
6) Theodore Roosevelt and American imperialism.
Needless to say, in much of history works published in Britain, Teddy Roosevelt is uniformly vilified as an unapologetic promoter of imperialism and militarism (due to "Speak softly but carry a big stick"). In fact I was so surprised to see that the American liberals had anything good to say about Teddy Roosevelt when I read about the Time magazine's sketches of greatest 20th century people in their 1999/2000 editions.
Thank you very much! Readers in New Zealand occasionally see British speech that is a little hidden from American readers (see long list of British publications not permitting posting of their articles here on FR).
One bit of evidence of Teddy Roosevelt's anti-imperialism is that Mexico has its own government--a government that often disagrees with our own. ;-) President Bush has been a most friendly president to Mexico, which Mexican government desires abolition of US immigration laws and an open border with no security.
Teddy Roosevelt was a fiscal (economic) conservative (anti-labor-union) but a social "progressive" (leftist), IMO. He was also a radical environmentalist in his time.