Ohio Gov. John Kasich is one of several governors from both political parties who are urging the Senate not to support the latest piece of legislation that would replace Obamacare.

The Hill reported that Kasich and Nevada Gov. Brian Sandoval, both Republicans, joined Democrats in signing a letter that was delivered to senators this week.

"Only open, bipartisan approaches can achieve true, lasting reforms," the letter reads. "Legislation should receive consideration under regular order, including hearings in health committees and input from the appropriate health-related parties."

The latest healthcare bill was introduced by Sens. Lindsey Graham, R-S.C., and Bill Cassidy, R-La. It involves sending federal money to the states, who would then build their own healthcare platforms.

Support for the bill is growing ahead of a Sept. 30 deadline to get it passed in the Senate via a simple majority. After that, it would need 60 votes to pass.

Colorado Gov. John Hickenlooper and Louisiana Gov. John Bel Edwards also signed the letter, The Hill reported.