We all "know" that the Republican party has taken a hard turn to the right.
Now we have visual proof of it thanks to the Brookings Institute. Check out their interactive graphic.
From the Brookings Institute page describing the nature of this interactive graphic:
"The juxtaposition of historical data on party unity and ideology in this graphic illustrates how these factors have interacted with House members over time. "
They provide historical data from the late 1850's to the present day.
Link to page:
Brookings Institute: Growing Gridlock in Congress
This is a remarkable achievement. I encourage you to see for yourself.
This is visual proof that in the past decade the Republican party has become vastly more conservative than almost any other time in their history.