The Colorado senator claims his new opponent engaged in dealmaking to clear the GOP field.
"Texans have witnessed what might be the laziest statewide campaign to date," they wrote.
Their support indicates controversies haven’t sunk Milton Wolf's Kansas Senate campaign.
The Mississippi senator has lowest rating of any member facing a serious GOP primary challenge.
"I have made no such ironclad promise," Cruz said Thursday.
The former president drew 1,200 supporters to a sold-out fundraiser for the Ky. Democrat.
Kingston is using his fundraising edge to launch a positive biographical ad to introduce himself to voters.
Cruz says he thinks GOP can win control of Senate in 2016.
An ad calls recent reports about Milton Wolf "stunning."
Can Shenna Bellows topple popular centrist Sen. Susan Collins (R-Maine)?