through democratic presidencies is getting more conservative. the presidency through republican presidents and democrat is presidents is also getting more conservative. the congress? shocker, this is from the same political scientist the university of georgia using the same measures of liberal and conservative, right? tracked this for both the house and senate, same bayic pattern both of them, easier to see with the house data. the basic idea here is that the middle line here, the middle line, the yellow line in the middle is set at zero, that is neither conservative or liberal, it marks moderate. the higher up you get the more conservative, the lower down you get the more liberal. obviously, republicans are more conservative they are up top, democrats up liberal, they are down below. the two lines up see on each side of the middle there, are the most moderate members of each party. those lines are more toward the middle, more toward the center. the lines at the very top and lines at the very bottom are