The U.S. House approved the bill in March by a 241-185 vote. The Senate passed the measure by a 51-48 vote in late June, but supporters needed 60 votes to force a quick end to debate.

The bill is unlikely to proceed in the current legislative session, but the upcoming election could strengthen the Democrats’ Senate majority. Business leaders also worry if Barack Obama wins the presidency, the bill’s chances will increase in the near future. Obama has pledged to sign the bill if it passes.

The law would also stiffen penalties for employers who commit unfair labor practices during an organizing drive and impose arbitration in bargaining cases when sides cannot agree.

A card check provision would allow unions to circumvent secret-ballot elections now supervised by the National Labor Relations Board. Unions would need only to collect signed cards from a majority of employees over a period of time.

Observers say the law could fundamentally alter modern labor law and spur the largest unionization movement since the National Labor Relations Act in 1935.

U.S. Sen. Elizabeth Dole is one of five politicians expected to attend the chamber rally, along with U.S. Reps. Patrick McHenry, Sue Myrick, Virginia Fox and Robin Hayes.

“By denying workers their basic right to a secret ballot, a right that has been enshrined in federal labor laws for over 60 years, this bill trades fair, democratic elections for intimidation and coercion,” Dole said in a news release.

Looks like some are worried about the possibility of a new round of unionization……would not be too good for the corporate suits to have more union workers.