The answer was simple, he said.
"Obamacare is the biggest job killer in the country," Cruz said during a brief media availability at the Fort Worth Club, after a Fort Worth Chamber of Commerce small business roundtable discussion wrapped up.
Cruz drew national attention earlier this year after a more than 21-hour speech in the Senate about why the nation's healthcare law needs to be defunded and for his efforts to link funding the federal government to defunding the healthcare law.
Some top Republicans have criticized his efforts; at least one online threat has been made against him.
But Cruz said the response he has received from Texans has been supportive.
"Throughout it all, the encouragement I have received from Texans all over our great state -- the prayers, the words of encouragement and support -- has been extraordinary," he said.
And he plans to keep fighting, and seeking ways to defund the Affordable Care Act.
"In this first round, the deal that came out was a lousy deal ... selling the American people down the river, providing no meaningful relief," he said. "Yet I'm encouraged. We saw millions of Americans rise up.
"The path to stopping harms from Obamacare ... is continuing to empower the American people."
-- Anna M. Tinsley