Liz Cheney has decided to drop her primary challenge to Sen. Mike Enzi, R-Wyo., citing health concerns in her family.

“Serious health issues have recently arisen in our family, and under the circumstances, I have decided to discontinue my campaign. My children and their futures were the motivation for our campaign and their health and well-being will always be my overriding priority,” Cheney said in a statement.

CNN's Peter Hamby was the first to report Cheney's decision.

I think Wyoming voters are breathing a sigh of relief, knowing that their state will no longer suffer a divisive primary race between two well-respected political families. Cheney is the eldest daughter of former Vice President Dick Cheney.

Cheney was already facing an uphill fight against Enzi, but her decision might be based on more than just politics.

Enzi had hinted at retirement before Cheney started pressing him on his plans for his political future. After it was clear that Cheney was planning on running for the seat, Enzi abruptly announced that he would run for re-election.

With Cheney out, the three-term senator is now facing six more years in the Senate.

Cheney's political future is unclear depending on the details of the unnamed health issues in the family. If she wanted to launch a bid for the state's lone House seat, as her father Dick Cheney did after returning from Washington, she might have a chance in spite of her failed bid for Senate.

Cheney worked hard to remind Wyoming voters that she and her family were happy to return to her family's home state. It's likely she could remain in the state for some time.