Because that is when the next election is. The theory is not let's lose this election so we can win in 2020...the theory is IF we lose the house this year...all is not lost and it's not the end of the world....that it might be a blessing in disguise because the dems will overplay their hand and overread the situation....just like they ALWAYS do. They will screw it up...go overboard...and piss everyone off over the next two years...and it will usher in a big red wave in 2020.
Texas Secretary of State for Cruz numbers.
https://enrpages.sos.state.tx.us/public/nov06_331_state.htm
I still think fight now. So far, so good. Then again in 2020. Don’t get lazy in midterms.