evidence: House Democratic leaders announced Monday that they were preparing a resolution condemning Trump’s remarks. In a letter to Democratic colleagues, Speaker Nancy Pelosi (Calif.) said Trump had gone "beyond his own low standards using disgraceful language about Members of Congress" and that Democrats would "forcefully respond to these disgusting acts." [...] Indeed, a House vote rebuking Trump’s tweets could unify a Democratic caucus that has been frayed by tensions. [...] Mike DeBonis and Felicia Sonmez contributed to this report.