ABC News June 21, 2016

President Obama Blasts Senate After Failed Votes on Gun Control Measures

WATCH: 4 Senate Gun Measures Fail After Orlando Shooting

President Barack Obama blasted the Senate for blocking four votes on gun control measures, considered in the wake of the Orlando nightclub massacre, in which a shooter killed 49 people and injured 53 others.

In a tweet, Obama expressed his frustration.

4 Senate Gun Measures Fail After Orlando Shooting President Obama Rips Gun Control Opponents After Meeting With Orlando Victims’ Families President Obama Calls Orlando Shooting an 'Act of Terror'

One doomed measure would have closed the so-called gun show loophole by extending the background check requirement to people looking to buy firearms at shows and on the internet.

Another failed bill would have blocked the sale of guns to people on a terrorist watch list for 72 hours while the government tries to prove, via the court system, that the person is a terrorist threat.

A third proposal would have barred anyone on a terrorist watch list from buying a gun, and a fourth would have increased the resources available to prosecutors for violators of gun laws.

All tweets from the @POTUS account are sent by Obama, not a staffer. Today’s tweet is the 259th that the president has posted to that account since it was launched May 18, 2015. @POTUS has about 8.5 million followers.