At House hearing, US ambassador to EU underlines immigrant roots, noting his parents' journey from Germany to Uruguay and later to US

At impeachment hearing, ambassador to European Union says he specifically told Pence he 'had concerns' that US military aid to Ukraine had become tied to Biden investigations

Career diplomat, war veteran Lt. Col. Alexander Vindman fends off Republican questioning of his judgment and loyalty as he testifies at presidential impeachment hearing

Jewish National Security Council staffer says Ukraine thrice offered him defense minister post, but he rejected it

In opening statement, Lt. Col. Vindman addresses father, who fled USSR with his family 40 years ago to start over in America; 'Do not worry, I will be fine for telling the truth'

'We have our country, we have our own problems,' president retorts at press conference in Kyiv

Nine current and former US officials will testify in House inquiry, including two top national security aides

US president tweets he will 'strongly consider' offer by House Speaker Nancy Pelosi on method to testify before the impeachment panel

Invitation comes ahead of second week of public hearings; Pelosi says if president doesn't like what he is hearing, he should come and talk, instead of tweeting

CNN says soviet-born businessman charged with campaign finance violations told confidantes of 2018 conversation with president, who sought his aid in arranging probe of Bidens