President Trump has yet to tweet on Thursday, as ex-FBI director James Comey testified before the Senate Intelligence Committee.

But there is one Trump out there who isn't shying away from Twitter as the hearing happens: his oldest son, Donald Trump Jr.

Trump retweeted the accounts for the GOP and a conservative strategist. But as questioning got underway, Trump's tweets picked up some steam:

His brother, Eric Trump, had chimed in a couple hours earlier, but he didn't livetweet the hearing.

Donald Trump Jr. and Eric Trump took over as co-heads of the Trump Organization after their father won the election. Sister Ivanka Trump is working for the administration and has not tweeted since Wednesday.