Trump to speak at GOP retreat in Baltimore after calling city "disgusting, rat and rodent infested mess"; Source: Possible dual role for Pompeo as Natl Security Adviser; Biden, Sanders & Warren on stage together for first time;

The Lead with Jake Tapper

Next hour: Trump leaves for Baltimore after disparaging city; Former WH official to New Yorker: Pompeo "among the most sycophantic" people among around Trump; Democrats on Judiciary Cmte. approve impeachment inquiry rules in first vote on issue; Some freshmen democrats in swing districts push back on impeachment inquiry; Democrats split on calling impeachment proceedings an inquiry or investigation; Speaker Pelosi shuts down questions on impeachment vote; Democrats face off at third debate tonight; Biden & Warren on stage together for first time; Warren makes play for older voters, unveils plan to expand social security; Biden releases video praising Obama hours before debate; Warren makes play for older voters, unveils plan to expand social security; Politico: Israel used surveillance devices to spy on Trump in U.S.; Putin launches raids across more than 40 cities in Russia today; GOP's Graham signals support on background checks as Trump debates what he'd sign into law; Red Flag laws and expanded background checks on list of options represented to Trump today; Influential republicans split on pros & cons of red flag laws; China taking on Trump, undermining U.S. presence in Europe; Chinese police, surveillance cameras sent into U.S. ally.

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