The map above shows the turnout and the candidate that won each county in the 2018 Senatorial election.  Jon Tester did not win a single county where voter turnout was high, whereas Matt Rosendale won six counties where voters turned out in droves.

The chart above shows the total votes (x axis), the turnout (y axis), and the margin of victory (intensity of color and size of circle) for each county in the state of Montana.  Jon Tester won two of the three largest counties as indicated by the blue circles to the right (just under the legend) with moderate margins.  Matt Rosendale, on the other hand, won the majority of small counties (on the left of the chart) but with large margins.  Rosendale also won the largest county, but with a very slim margin (small circle at the far right end).  Rosendale also won counties with the largest voter turnout.

The map above shows the turnout and the candidate that won each county.  The only place where Beto O'Rourke won and the turnout was high was in Austin and its northern suburbs.  Every other county he won had either moderate or low turnout.  Ted Cruz, on the other hand, had really high turnout in San Antonio's northern suburbs and various other counties throughout the state.  He also won very few counties with low turnout.

The chart above shows the total votes, the turnout, and the margin of victory for each county in the state of Texas.  Beto O'Rourke won the five largest counties as indicated by the blue circles from the center to the right, but won them by such a small margin.  Ted Cruz, on the other hand, won the majority of small counties but with really large margins.  Ted Cruz won the counties with both the smallest and largest voter turnout.

The chart above shows the percentage of registered voters that voted in each county and the party that won said county.  The Democrats won the counties where a greater percentage of registered voters showed up to vote.  The only decisive victory the Democrats had where registered voters did not really show up to the polls was in Macon County.  The Republicans only won one county (Shelby) where registered voters actually showed up in great numbers.

The chart above shows the percentage of people that voted in each county and the party that won each county.  The Democrats won the counties where people went to the polls in droves while the Republicans won the counties where most people stayed home.