Via National Review:

Marco Rubio has begun telling colleagues he will run for reeelection to the Senate, according to two sources familiar with the discussions.

The Washingtonian has more details:

Marco Rubio reached out to Ted Cruz to confirm his intent to run for reelection to his Florida Senate seat, according to sources familiar with the matter.

According to two aides briefed on the Tuesday phone call, Rubio asked Cruz to blast out a statement urging Rubio to run for reelection, “so it’s not just Mitch [McConnell]” asking him to do so, as one aide described it.

Those aides say Cruz declined, as he didn’t want to be accused of nudging out US Representative Ron DeSantis, the tea-party favorite in the race for Rubio’s seat. The aides say that Senator Mike Lee of Utah echoed that concern after Rubio approached him with the same request. A Lee aide confirmed that this conversation took place.

This all dovetails with the events of the past couple of weeks where Representative David Jolly terminated his Senate campaign after saying — then walking it back — that Rubio was going to run. We have also seen a long time Rubio ally, Lieutenant Governor Carlos Lopez-Cantera, say he would withdraw from the race if Rubio got it.

The deadline for filing is Friday.