Kathy Barnette, a Republican Senate candidate in Pennsylvania, has a social media history packed with anti-Muslim and anti-LGBTQ sentiments, as well as conspiracy theories about former President Obama. (snip) Driving the news: Former President Donald Trump warned Republicans Thursday that Barnette's history will preclude her from winning a general election in Pennsylvania. Trump has endorsed celebrity TV doctor Mehmet Oz in the race. (snip) In one of the tweets, Barnette said "pedophilia is a cornerstone of Islam." (snip) Worth noting: Barnette talked derogatorily about Muslims, Islam and Obama in speeches as well, CNN reports.