A partisan legislative standoff in Oregon persisted on Monday, as Republican state lawmakers stayed clear of the state Capitol for the fifth day in a row in an effort to block a climate change bill that Democrats are pressing to approve.

Democrats, who control the Oregon Senate as well as the House of Representatives, were preparing to vote on the measure last week when all 11 Republican senators disappeared. Without the votes to reject the bill, which would require businesses to reduce greenhouse gas emissions, the Republicans denied the Democrats a needed quorum, blocking a vote from taking place in the Senate.

Gov. Kate Brown, a Democrat, has ordered the Oregon State Police to find the Senate Republicans and bring them back to the Capitol in Salem for a vote. As of Monday morning, none of the Republicans had been found. Some were said to have left the state. And there was no sign of a resolution.

What is this fight really about?

Oregon Democrats are trying to push through a bill that would significantly decrease the amount of greenhouse gases that businesses are legally allowed to emit. The Democrats say the bill is needed to reduce the effects of global warming.