(CNN) - It's election day in a once little-talked-about contest to fill a vacant congressional seat in upstate New York, that is now firmly in the national political spotlight.

And over the past month, the race in New York's 26th congressional district between Republican state Assemblywoman Jane Corwin, Democrat Kathleen Hochul, the Erie County clerk, and Jack Davis, a once-conservative Democrat who is running as a so-called tea party candidate, has to a degree turned into a proxy battle on House Republican plans to alter Medicare.
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