Did Obamacare premiums double in most states this year? No

The nonpartisan Congressional Budget Office says the House-passed Republican health care bill would leave 23 million more Americans without insurance by 2026.

Republicans counter that the situation with the Affordable Care Act is dire. "Obamacare is collapsing. We must do something," Sen. James Lankford, R-Okla., said in a Facebook post May 24.

"This year, a majority of states are seeing premiums and costs double, including states that expanded Medicaid. Three states – Alaska, Alabama, and our own Oklahoma – are seeing premiums triple."...
http://www.politifact.com/truth-o-meter/statements/2017/may/25/james-lankford/did-obamacare-premiums-double-most-states-year-no/