Yep. In 2014 (the most recent year I could find) only 25% of the voters are registered Republican, and 31% Democrat. 42% are independent. Neither party can win without appealing to independents.
This is what some do not understand.
Some keep saying it’s Dems voting, but it is mostly non party voters and we need them to win in the general.
If Cruz think and I have just heard his spokeswoman state they want republicans to come out favor Cruz then they are delusional.