Divides over what GOP priorities should be ahead of this fall's midterm elections are testing the relationship between President Trump and Senate Republicans.

The flashpoint is the SAVE America Act...

Divides over what GOP priorities should be ahead of this fall's midterm elections are testing the relationship between President Trump and Senate Republicans.

President Donald Trump may be the head of the Republican Party, but when it comes to the Senate, Majority Leader John Thune is still in charge.

Several Republicans insisted the meeting would be friendly despite tension between the White House and Senate Republicans.

"I make no apologies for standing up to the president," Cassidy told reporters.

Republicans on Capitol Hill had been hoping to spend the summer touting a rare bipartisan legislative feat, but Donald Trump and his growing anger toward Senate Republicans…