AUSTIN —Even as Greg Abbott and many fellow Republicans were still basking in what they called Texas' "most conservative 48 hours" in history, a former one-term state senator announced he would challenge the governor in next year's primary from the right. Don Huffines, a scion of a Dallas family that made its fortune in the auto dealership business and a co-founder of a prosperous real estate development company, announced his candidacy in a series of tweets and retweets Monday. He promised "to finish the wall," eliminate property taxes and protect "election integrity." On one of the tweets, Huffines signed with the line, "An Actual Republican."