Have the democrats shifted left?

[bore]

 Every time there is an old congressional map or a thread about a former congressman or a thread when a republican says something crazy, there is always at least one moderate hero who says "yes the republicans are further right than they were but the democrats are just as bad". So, I'm genuinely (I actually don't know) curious, apart from the obvious choice of gay rights where are democrats further left from where they were in the 90s?