From
http://millercenter.org/president/Johnso...aphy/print:
"Among historians, supporters of Johnson are few in recent years. However, from the 1870s to around the time of World War II, Johnson enjoyed high regard as a strong-willed President who took the courageous high ground in challenging Congress's unconstitutional usurpation of presidential authority. In this view, much out of vogue today, Johnson is seen to have been motivated by a strict constructionist interpretation of the Constitution and by a firm belief in the separation of powers."