A head to head comparison of the New Mexico 2020 Primary gives us an idea of the break down of the voters.
Joe Biden got 50% (182k) of the vote to beat Donald Trump (144k votes) by 40% and Bernie Sanders (37k votes) by 10%.
Joe Biden wins 16 out of the 33 counties in the sate of New Mexico. Donald Trump won more counties than Joe Biden, but did not get as many votes as he did.
Bernie Sanders vs Joe Biden
Joe Biden vs Donald Trump
Donald Trump vs Joe Biden
In a head to head match up on just the total number of votes, Joe Biden (83%) beats Bernie Sanders (17%). Joe Biden (56%) beats Donald Trump (44%). Donald Trump (79%) beats Bernie Sanders (21%).
These 10 counties play an important role in these primary elections. The top county (Bernalillo) contains nearly 3 times as many voters as the 2nd top county (Santa Fe). Winning Bernalillo would give a candidate a huge advantage over their competitors.
Joe Biden won an advantage in Bernalillo over Donald Trump and obtain enough votes in the other counties to beat him in the 2020 Primary election in the state of New Mexico. Joe Biden achieved a majority vote in other populous counties, securing him the victory over his opponents.
Related References: 2016 New Mexico General Election Story, 2016 New Mexico Primary Election Story