Pivotal Research analyst Brian Wieser downgraded Discovery Communications and other names in the Internet/Advertising space citing a riskier political environment post the U.S. election. Valuations do not appropriately reflect that the environment for stocks and companies is riskier now than was the case several months ago, Wieser tells investors in a research note. He believes "significant factions" within the government support "mercantilism and populism," creating uncertainty as to what policies will take effect. The analyst lowered his price target for Discovery shares to $28 from $33.