Just before announcing that she would be leaving Congress to run for the U.S. Senate, Democrat Ann Kirkpatrick called her friend K.C. Clark, the Navajo County sheriff, to ask him if he was interested in running for her seat in Arizona’s 1st Congressional District in 2016.

An Arizona congressman wants to repeal approval of a land swap that cleared the way for the country's largest copper mine southeast of Phoenix.

New federal rules designed to better protect small streams, tributaries and wetlands ai??i?? and the drinking water of 117 million Americans ai??i?? are being praised by environmentalists as a victory for clean water and criticized by Republicans and farm groups as going too far.

Sen. Catherine Miranda is “strongly exploring” running for Congress in Arizona’s 1st Congressional District.

Fearing defeat at the Supreme Court, more than a dozen members of Congress from California and Arizona introduced legislation Friday to preserve the congressional boundaries set by independent redistricting commissions.

Republican lawmakers are troubled that Arizona State University and University of Arizona have been lobbying Congress to help “dreamers” gain citizenship.

Federal legislation to block the Tohono O’odham Nation from operating a casino on its Glendale property could cost taxpayers up to $1 billion according to a new report.

Freshman Rep. Martha McSally, R-Tucson, raised more than $643,576 in the first three months of the year and has more than $820,593 in the bank for any potential challenges, according to the latest campaign finance reports.

U.S. Sen. John McCain confirmed his long expected reelection bid, announcing that he’ll seek a sixth term.

Now that lawmakers have voted in favor of a proposal allowing the Arizona State Land Department to fund itself through the sale of state trust land, two more votes may be needed before the plan can go into effect – one from the state’s voters and one from Congress.