Rosemary Bigley, of Service Employees International Union, says she will vote for Democratic candidate Conor Lamb for Congressman, in Canonsburg, Pa., on Feb. 27.

Rosemary Bigley, of Service Employees International Union, says she will vote for Democratic candidate Conor Lamb for Congressman, in Canonsburg, Pa., on Feb. 27.

Rosemary Bigley, of Service Employees International Union, says she will vote for Democratic candidate Conor Lamb for Congressman, in Canonsburg, Pa., on Feb. 27.

Rosemary Bigley, of Service Employees International Union, says she will vote for Democratic candidate Conor Lamb for US Congress, in Canonsburg, Pa., on Feb. 27, 2018.