Links
[1] https://polsci.umass.edu/toplines-and-crosstabs-february-2020-umass-amherstwcvb-poll-massachusetts-super-tuesday-registered
[2] https://polsci.umass.edu/sites/default/files/SuperTuesdayMAToplines.pdf
[3] https://polsci.umass.edu/sites/default/files/SuperTuesdayMACrosstabs_0.pdf