CHEYENNE, Wyo. (AP) — An increasingly influential congresswoman from Wyoming isn't ruling out running for U.S. Senate but says she has no announcement to make.

Republican U.S. Rep. Liz Cheney says she's focused on her work in the U.S. House rather than possibly succeeding Republican U.S. Sen. Mike Enzi. Wyoming's senior senator plans to retire at the end of his fourth term in 2021.

Cheney first won election to Congress in 2016. Her peers already have chosen her to chair the Republican caucus, the third-highest Republican leadership position in the U.S. House.

Cheney neither hinted at a possible Senate run nor ruled it out when asked recently. Other possible 2020 candidates for U.S. Senate in Wyoming include former Republican Gov. Matt Mead, GOP donor Foster Friess and former Republican U.S. Rep. Cynthia Lummis.