Article snippet: Voters in Pennsylvania’s 18th Congressional District will head to the polls on Tuesday in a special election seen as a crucial test of the midterm elections. The Democrat, 33-year old Marine Corps veteran and former assistant U.S. attorney Conor Lamb is taking on 60-year old, four-term state representative Rick Saccone to represent the southwestern Pennsylvania district where President presidential election. Tuesday’s special election was triggered by the resignation of Republican Rep. Tim Murphy last following a report that he allegedly asked an extramarital lover to end her pregnancy. The closely-watched contest has seen close to $10 million spent by conservative groups to boost Saccone and stave off concerns that the GOP is falling out of favor with the same blue-collar voters that propelled Donald Trump to the White House. National attention on the race has reached a fever pitch over the past couple weeks, with both President Donald Trump and former Vice President Joe Biden swinging through the district in the past week to campaign. Here are five things to watch ahead of Tuesday night’s contest. National figures factor in While Democrats are largely portraying this year's midterm elections as a referendum on President Trump, the most frequently referenced national politician in PA-18 has been Nancy Pelosi — Republicans have relentlessly attempted to tie her to Conor Lamb. Ads pushed by outside groups riff on Lamb's surname, featuring jingl... Link to the full article to read more