Senator Jeff Merkley of Oregon and Rep. Jared Polis of Colorado on Thursday reintroduced the Employment Non-Discrimination Act (ENDA).

The bill seeks to outlaw workplace discrimination based on sexual orientation and gender identity.

Republican Rep. Ileana Ros-Lehtinen of Florida joined Polis in introducing the House version of the bill.

“Across our country, LGBT Americans face the daily fear of losing their jobs and livelihood simply because of who they are or who they love,” Polis said.

Ros-Lehtinen added: “No American should have to fear harassment at work, or risk losing their livelihood because of who they are. That is why Congress needs to work to get this bill passed and set a national standard of equality for all in the workplace.”

Support for the bill in the Senate is also bipartisan and includes GOP Senators Mark Kirk of Illinois and Susan Collins of Maine. Democrats co-sponsoring the measure include Senators Tammy Baldwin of Wisconsin and Tom Harkin of Iowa.

Like Ileana Ros-Lehtinen in the House, Kirk supports marriage equality.

“Discrimination is just plain wrong,” Merkley said. “It is shocking that there is still anywhere in America where it is legal to fire someone for their sexual orientation or gender identity.”

A version of ENDA was first introduced and rejected by lawmakers in 1974. In 2007, lawmakers for the first time added protections based on gender identity to the measure.