Republican senators return on Monday from a 10-day recess with immediate decisions to make on their quest to overhaul the 2010 health care law.

While Senate leaders have largely avoided putting any artificial timelines on their endeavor, the GOP is under an extreme time crunch to produce and advance their own legislation to match the House bill that narrowly passed the chamber last month.

Some members, however, are now openly doubting whether Republicans can follow through on their seven-year effort to repeal and replace President Barack Obama’s signature domestic achievement.

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