How to watch the Pennsylvania special election

What: Live coverage of Pennsylvania's special election Date: Tuesday, March 13, 2018 When: All polls close by 8 p.m. ET Online: PA-18 results live blog from CBS News Politics Video Stream: Watch the live stream on CBSN

Democrat Conor Lamb and Republican Rick Saccone face off in Pennsylvania's special election Tuesday to fill the House seat left vacant by Rep. Tim Murphy, who resigned in October. Pennsylvania's 18th district has been a safe Republican district, but polling Monday showed Lamb with an edge.

The district, nestled in the suburbs of southwest Pittsburgh, is Republican territory, where Donald Trump won by nearly 20 points in 2016.

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