In the standard styles you could turn off the dash with the option
dashed=false, see Get full name twice in Bibliography.
The styles of
biblatex-chicago do not know that option and do not allow you to turn the dash off easily. It is a feature of the Chicago Manual of Style bibliography styles that they replace subsequent mentions of the same author list with a dash.
Since there is no option to turn off the dash, there is no convenient way to get rid of it, you need to play with internal macros. You can essentially tell
biblatex to forget who the last author was by undefining
\bbx@lasthash, which forces the style to never use the dash to replace the name.
Please note that the styles of
biblatex-chicago should ideally be loaded using the wrapper package
biblatex-chicago and not the normal
biblatex package (as shown in the MWE). But then you can't use the