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Associated Press reports

11:35 a.m.

Sen. Bob Corker is hitting back against President Donald Trump after a series of Trump tweets attacked the Tennessee Republican.

It’s an extraordinary back-and-forth bashing on social media between a Republican president and a senator from his own party.

Here’s what Corker is saying: “It’s a shame the White House has become an adult day care center. Someone obviously missed their shift this morning.”

Trump tweeted that he expected Corker to be an obstacle to the White House agenda’s and charged that Corker “didn’t have the guts to run” for re-election in 2018.

Trump accused Corker of being “largely responsible for the “horrendous” nuclear deal with Iran. But it was the Obama administration that negotiated that agreement.

11:10 a.m.

President Donald Trump is aiming a series of stinging tweets at a retiring Republican senator who’s taken a critical line toward the White House.

Trump’s targeting Tennessee’s Bob Corker, the Senate Foreign Relations Committee chairman who’s not running for re-election in 2018.

Corker’s apparently drawn Trump’s ire for saying recently that the Pentagon chief, the secretary of state and Trump’s own chief of staff are “those people that help separate our country from chaos.”

Trump tweets that Corker “begged” for a presidential endorsement for re-election. Trump says he said “no” and then Corker decided not to run. But The Associated Press has reported that Trump and Corker met privately at the White House last month, and Trump urged Corker to run.

Trump says he now expects his fellow Republican “to be a negative voice and stand in the way” of the White House’s agenda. And Trump’s accusing Corker of being “largely responsible” for the landmark Iran nuclear deal.

But the Obama administration negotiated the international agreement, and Corker tried to require that President Barack Obama submit it to Congress for approval.

WASHINGTON (AP) – Sen. Bob Corker is always one to speak his mind.

Political insiders say the Tennessee Republican’s new free agent status should make President Donald Trump and the party even more nervous.

The two-term senator isn’t seeking re-election. That gives him even more elbow room to say what he wants and to vote how he pleases over the next 15 months as President Trump and Republican leaders on Capitol Hill struggle to get their agenda on track.

Corker says he’ll oppose any legislation that increases the national debt by a single cent.

Republicans hold a narrow, 52-seat majority in the Senate. Just three defections would torpedo the party’s top legislative priority in their partisan push.

President Donald Trump took to Twitter early Sunday morning to share his opinion on Senator Corker, who in return tweeted later comparing the White House to an adult daycare center.

Senator Bob Corker "begged" me to endorse him for re-election in Tennessee. I said "NO" and he dropped out (said he could not win without… — Donald J. Trump (@realDonaldTrump) October 8, 2017

..my endorsement). He also wanted to be Secretary of State, I said "NO THANKS." He is also largely responsible for the horrendous Iran Deal! — Donald J. Trump (@realDonaldTrump) October 8, 2017

…Hence, I would fully expect Corker to be a negative voice and stand in the way of our great agenda. Didn't have the guts to run! — Donald J. Trump (@realDonaldTrump) October 8, 2017

It's a shame the White House has become an adult day care center. Someone obviously missed their shift this morning. — Senator Bob Corker (@SenBobCorker) October 8, 2017