The vast majority of congressional Republicans are publicly supportive of President Donald Trump’s decision to launch a war on Iran. But many are harboring private misgivings about the risks to American troops and global stability — as well as their own political fortunes — should the military campaign drag on indefinitely.

Trump’s comments this week that the bombing could last “four to five weeks” or more, that he doesn’t care about public polling and that the U.S. will do “whatever” it takes to secure its objectives are among the factors that have put lawmakers on edge.

Some of the anxieties have started emerging publicly.

“The constitutional…

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