WASHINGTON (AP) — For once, Republicans and Democrats in Congress were in the same place: out of the loop.

When it came to President Donald Trump's abrupt announcement that U.S. forces would no longer protect Syrian Kurds from a Turkish invasion, his supporters knew as little as his critics.

All the effort by Republicans to assuage and court the mercurial president meant little in terms of their ability to dissuade him from a decision that most of them vehemently opposed. They found out about it like Democrats, late at night and on Twitter.

For Republicans, it was a reminder that having the pr...