@Bratwurst Boy
Sure here's two maps.
The first map shows, by region, what percent of population claimed Russian as their native language.
The second map shows the results of the 2010 elections, won by Yanukovich.
You can see the two sort of overlap. Russian speaking regions primarily gave their votes to Yanukovich.
An actual ethnic map of Ukraine is difficult to produce. Ukraine has conducted its last census back in 2000. In that census, only 17% or so self identified as Russian. The previous censuses in the 1990s produced totally different results. What it shows, is that many people transitioned from calling themselves Russian to calling themselves Ukrainian.
The actual number of people that have "Russian" blood, is anyone's guess, because Ukraine is such an insane mixing pot of Russians, Ukrainians, Poles, Tatars, Gypsies, Hungarians, etc.