Reports circulating on Capitol Hill and in the Trump camp suggest that speaker of the House Paul Ryan will endorse the presumptive nominee as early as this week.

The Hill:

Ryan is telling confidants he wants to end his standoff with Trump — in part because of concerns their split has made intraparty fighting worse.

Top Trump aide Paul Manafort told some Republican lawmakers he expects Ryan to endorse as early as this week, though aides to the speaker say nothing has been decided about a possible endorsement yet.

Earlier this month, Ryan met with Trump after saying he wasn't yet ready to endorse the presumptive Republican nominee and indicated he would continue calling out the businessman, telling Politico, “I've done that in the past, and I will do that in future if need be, and I hope it’s not necessary.”

Ryan has previously condemned Trump's proposal to temporarily ban Muslims from the U.S., swiped at the businessman for not forcefully disavowing support from a former Ku Klux Klan leader and called on Trump during the primary to control violence at his rallies. 

"I feel that I can play a role in unifying. I don't want to see our party divided," Ryan said Monday in an interview with Politico. "The people in the primaries are speaking."

Ryan made a colossal error in not endorsing Trump when it became clear he would be the nominee.  His high-profile refusal to do so did nothing for party unity and roiled the GOP caucus in the House.  Even since his meeting with Trump two weeks ago, Ryan has continued to be coy about his endorsement, most recently responding to a question about whether Trump could win in November by saying he thought Trump could win, but he "wouldn't bet on it."

Ryan never had any realistic choice.  As the highest ranking Republican in government, he was forced to either get behind Trump or quit the speakership.  All indications are that he is still reluctant to fully get behind the nominee.  But even a grudging endorsement will be a step in the right direction.