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U.S. Rep. Justin Amash, R-Cascade Township

(Emily Zoladz | Mlive.com)

GRAND RAPIDS, MI — U.S. Rep. Justin Amash remained unswayed about a military strike against Syria after attending a classified briefing Sunday in Washington, D.C.

Amash, R-Cascade Township, reiterated his skepticism in a tweet shortly after leaving the afternoon congressional briefing held by advisers to President Barack Obama.

During the briefing, officials laid out evidence of a chemical attack by Syrian authorities and fielded questions from lawmakers, The Washington Post reported.

"The Obama administration still has not presented a compelling U.S. interest in attacking #Syria or a coherent long-term strategy," Amash tweeted afterward.

In another tweet, Amash said "Several Members of Congress have remarked that nearly 100% of ppl who have contacted them about #Syria are opposed to U.S. military strikes."

Obama on Saturday announced he would seek congressional approval for a military strike against Syria after allegations the country's leader gassed thousands of its citizens.

During remarks in the White House Rose Garden on Saturday, Obama argued Syrian leaders should not be allowed to commit the alleged act without retribution.

By some counts, more than 1,400 Syrians — including hundreds of children — died after recent chemical weapons attacks.

Despite this, Amash said he was unconvinced a strike was needed.

""Pres Obama hasn't come close to justifying war in #Syria," Amash tweeted Saturday. "I look forward to this debate. Pres must comply w/ vote of Congress; not optional."

The sophomore lawmaker was to return to Michigan later Sunday, where he's been since Congress broke for a five-week recess in early August

He was scheduled to host a town hall meeting at 5:30 p.m. Tuesday, Sept. 3, at the Grand Rapids Public Library.

It was unclear whether Amash's fellow West Michigan Rep. Bill Huizenga, R-Zeeland, also attended Sunday's briefing. A message to Huizenga's spokesman was pending.

Both men are due back in Washington next week to resume proceedings, including debate and a potential vote on whether to strike Syria.

Amash retweeted multiple military servicemembers on Twitter who urged him to vote against an attack. He also urged swifter debate on Syria in another Sunday tweet.

"I continue to urge House & Senate ldrs to convene Congress so we can begin formal debate on #Syria. Only Pres, Spkr & Sen Maj Ldr can do so," he wrote.

Zane McMillin is a government, weather and breaking news reporter for MLive.com and The Grand Rapids Press. Email him, and follow him on Twitter.