Republican Liz Cheney, the daughter of former vice president Dick Cheney, will challenge Sen. Mike Enzi (R-Wyo.) in 2014, she announced Tuesday, a move that appeared to irk the senator, who announced on the same day that he is running for reelection.

"I am running because I believe it is necessary for a new generation of leaders to step up to the plate," Cheney said in a nearly six-minute Web video announcing her candidacy. In the video, Cheney sharply criticized the Obama administration, arguing that the "federal government has grown far beyond anything the pioneers of our great state ever could have imagined or would have tolerated."

Obama, she said, "has launched a war on our Second Amendment rights, he's launched a war on our religious freedom, he's used the IRS to launch a war on our freedom of speech, and he's used the EPA to launch a war on Wyoming's ranchers, our farmers and our energy industry."