SANTA FE, N.M.—New Mexico's senior senator, Democrat Tom Udall, and Republican Rep. Steve Pearce say they're opposed to a U.S. military strike against Syria over its use of chemical weapons.

Udall said Tuesday he's gravely concerned the U.S. will get further embroiled in a Middle East civil war if there's military action against Syria.

President Barack Obama is seeking congressional approval of legislation authorizing a military strike.

Pearce said "America cannot fight every battle" and he's backing a proposal to block funding for any use of force against Syria.

U.S. Sen. Martin Heinrich says he'll vote for a Senate resolution authorizing U.S. military action in Syria.

The first-term Democrat doesn't support sending U.S. troops into Syria but says America must deter Bashar al-Assad's regime from again using poison gas.