DC Council Votes

How Much Do Councilmembers Agree on Votes?

Since the composition of the council didn't change in the 2018 election, we've had the same members for council periods 22 and 23 (from the beginning of 2017). I've analyzed all the votes from that period (obtained from the Legislative Information System API) to determine how often each pair of legislators votes the same way.

More than 95% of the votes in the council during this time were unanimous (had no "no" votes), so I excluded those noncontroversial votes from the analysis, leaving 128 votes. I also considered only cases where a person voted yes or no (so not abstentions or recusals, for example). For each pair, I took the number of times they voted the same way and divided by the number of times they were both present and voting. The results are in the table below.

I also included a column with the average for each member of how often their vote agreed with each of their colleagues. A high average might indicate members who are more cooperative or more pliant, depending on your point of view, while a low average might mean someone is more independent or more disagreeable. Note that the two independents (Grosso and especially Silverman) have the lowest averages.

Bonds
Todd
Nadeau
Allen
Grosso
Silverman
Evans
McDuffie
Cheh
Mendelson
R White
T White
Gray
Average
Bonds 100 89 71 81 63 50 85 88 77 86 80 71 84 77
Todd 89 100 62 74 56 41 82 82 69 78 77 67 83 72
Nadeau 71 62 100 81 71 59 58 64 67 61 74 66 65 67
Allen 81 74 81 100 70 59 69 70 82 72 80 73 76 74
Grosso 63 56 71 70 100 58 49 58 62 52 67 71 65 62
Silverman 50 41 59 59 58 100 41 43 54 42 57 63 45 51
Evans 85 82 58 69 49 41 100 83 69 88 67 63 75 69
McDuffie 88 82 64 70 58 43 83 100 62 77 85 74 82 72
Cheh 77 69 67 82 62 54 69 62 100 69 69 60 70 67
Mendelson 86 78 61 72 52 42 88 77 69 100 67 59 73 69
R White 80 77 74 80 67 57 67 85 69 67 100 76 82 73
T White 71 67 66 73 71 63 63 74 60 59 76 100 75 68
Gray 84 83 65 76 65 45 75 82 70 73 82 75 100 73