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Republican senators walk out of briefing on Ukraine. Video, 00:00:56Republican senators walk out of briefing on Ukraine

Senator drops hold on hundreds of military promotions

US senator defends threat to union boss at hearing

Watch: US senator challenges man to fight mid-hearing. Video, 00:01:21Watch: US senator challenges man to fight mid-hearing

Why shutdowns seem to only happen in US

Republican senators lash out at one of their own. Video, 00:00:55Republican senators lash out at one of their own

US Senator's wife denies charges in Egypt case

Strategist Butler to replace Feinstein as senator

The complicated race to replace Diane Feinstein

Feinstein, the senator who defied CIA and White House

'Pioneering' Senator Dianne Feinstein dies aged 90

US Senate votes to reimpose dress code in chamber

Senator pleads not guilty as FBI probes Egypt ties

Democrats turn on own senator over bribery case

US Senate chairman steps down amid bribery charges

US senator allegedly bribed with 'a lot of gold'

Prosecutor shows evidence against Senator Menendez. Video, 00:00:25Prosecutor shows evidence against Senator Menendez

Top military jobs confirmed after abortion row delay

Romney: We don't need another person in their 80s. Video, 00:00:23Romney: We don't need another person in their 80s

Former Lt Col: Tuberville ‘makes my blood boil’ Video, 00:01:02Former Lt Col: Tuberville ‘makes my blood boil’

US senator freezes in front of reporters. Video, 00:00:33US senator freezes in front of reporters

Senate abortion row leaves Marines leader in limbo

FBI downplayed risk of Capitol riot - Senate report