Name the Political Party!

A national figure recently signed a pledge to defend something-or-other that contained this paragraph:

Slavery had a disastrous impact on African-American families, yet sadly a child born into slavery in 1860 was more likely to be raised by his mother and father in a two-parent household than was an African-American baby born after the election of the USA’s first African-American President.

Name the political party of the candidate groping for the silver lining deep within the towering thunderhead of slavery!