Chicago tuning is a type of tuning traditionally used for 4 string plectrum banjos that is tuned the same as the top 4 strings of a guitar (D, G, B, E). This allows guitarists to use the same fingerings as they do on guitar. This tuning is traditionally used on plectrum banjos because the scale of the neck of plectrum banjos is very close to that of guitars so standard plectrum banjo strings can be used.
For sure, many guitarists are doing this with tenor banjos as well.
D chord is bad.