How to avoid graphing duplicate rows in Pandas .plot()

I have a Pandas DataFrame that looks like this with many entries for all 50 US states:

State Name	School District	Schools Per District
Alabama	Alabama District 1	21
Alabama	Alabama District 2	5
Alaska	Alaska District 1	3
Alaska	Alaska District 2	4

I want to use Pandas to graph the numbers of school vs. state, and so far I have the following code:

school_data.plot(kind='bar', 
                     x="State Name", 
                     xlabel="State",
                     y="Schools Per District",
                     ylabel="Number of Schools",
                     rot=0,
                     width=10,
                     figsize=(15, 5),
                     title="Number of Schools per District vs. US State"
                     );

However, the resulting graph I believe is graphing every single school district instead of summing all school districts by state, and is therefore printing too much data.

How would I fix this so that there are only 50 bars on the graph, where each bar represents the total number of schools per state?

source https://stackoverflow.com/questions/75966854/how-to-avoid-graphing-duplicate-rows-in-pandas-plot

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