ProPublica has a clickable list of congress members' statements about Charlottesville.
As to why these statues were erected, I look to this:
Striking graphic reveals the construction of Confederate monuments peaked during the Jim Crow and civil rights eras
Interesting. This NPR interviewee, Edward Ayers, suggested it was when the surviving confederate soldiers were dying.
The shifting history of Confederate monuments
Some memorials to fallen Confederate soldiers began immediately after the Civil War, but what we think of as these Confederate statues are really much more a product of the 1890s to World War I period.
And so decades go by after the end of the Civil War before this widespread effort to memorialize the Confederacy appears. And you might say, well, why the lag? Well, it’s, in part, because that’s when Confederate veterans were dying.
And their daughters, United Daughters of the Confederacy, took main responsibility for making sure that they were not forgotten. And so they raised money in small towns and large cities all across the South to put up these memorials to the Confederate soldiers.