Leading House lawmakers have introduced legislation abandon a centerpiece of former Gov. Sarah Palin's administration: a state-sanctioned effort to advance a major natural gas pipeline.

The measure proposed Friday underscores the impatience and skepticism that many lawmakers have expressed with the current process and a belief the state is no closer than it was several years ago to realizing a long-hoped-for line.

Under the Alaska Gasline Inducement Act championed by Palin, the state promised TransCanada Corp. up to $500 million to advance a line. TransCanada won the exclusive license in 2008.

TransCanada missed a self-imposed target for reaching agreements with shippers at the end of 2010 but has cautioned against reading much into that, noting that negotiations are complex.

Numerous lawmakers, though, are losing patience and faith.