Mark Warner, the senior US Senator from Virginia, talks with Recode's Kara Swisher about several interconnected policy issues affecting the 2020 elections, including the security of voter registries, the expectation of social media manipulation by Russia and other hostile foreign powers, and the newly announced impeachment inquiry into President Trump's phone call with Ukrainian president Volodymyr Zelensky. Sen. Warner also talks about the potential of regulators breaking up tech giants and how the US government's relationship with those companies has improved since 2016, yet still calls for more oversight of their unprecedented power. Plus: Why he's "cautiously optimistic" about Republicans in the Senate embracing election reform and new privacy laws, his proposal for incentivizing companies to invest in their workers, and how Warner thinks Congress might be able to fix Section 230 of the Communications Decency Act without repealing it wholesale. Editor's note: This interview was recorded the morning of Wednesday, September 25, before the release of the White House memo with a "transcript" of Trump's call with Zelensky. Featuring: Mark Warner (@MarkWarner), US Senator from Virginia Hosts: Kara Swisher (@karaswisher), Recode co-founder and editor-at-large More to explore: Subscribe for free to Pivot, Kara’s podcast with NYU Professor Scott Galloway that offer sharp, unfiltered insights into the biggest stories in tech, business, and politics. If you haven't already, check out Kara's past interviews with Rep. Adam Schiff and Whistleblower Aid CEO John Napier Tye. About Recode by Vox: Recode by Vox helps you understand how tech is changing the world — and changing us. Follow Us: Newsletter: Recode Daily Twitter: @Recode and @voxdotcom ... But enough about us We are conducting an audience survey to better serve you. It takes no more than five minutes, and it really helps out the show. Please take our survey here.