Update 
"Senate Bill 1289 by state Sen. Brandon Creighton, R-Conroe, would require large state projects — such as buildings, roads and bridges — to purchase iron and steel from an American supplier if the cost doesn’t exceed 20 percent more than the price of cheaper, foreign imports. Under the bill, any country's iron and steel can be used if American suppliers aren't prepared to supply a project or there is a compelling state interest." 

Amendments still to be voted on. 
Also worth noting.
Ontario steel industry is a misleading term. 
Foreign steel companies with Ontario operations is more accurate 

Stelco - Bedrock Industries USA 
Essar Steel Algoma (formerly Algoma Steel) - Essar Group India  
Dofasco - ArcelorMittal Luxembourg