Story highlights Republican senators returned to Washington after Donald Trump became the GOP presumptive presidential nominee

Many GOP senators appeared to give the idea of a Trump nomination a chilly reception

Washington (CNN) Faced with the reality that Donald Trump is now the face of their party, Republican senators appeared squeamish as they returned to the Capitol on Monday for the first time since the billionaire became the presumptive nominee of the Republican party.

It's been a little less than a week since Trump effectively secured the nomination following a decisive win in Indiana's Republican primary, but his relationships among lawmakers and leaders of his own party remain rocky at best. Former presidents and nominees and other top leaders have repeatedly said they are skipping the convention where he is expected to receive the nomination.

Sen. Jim Risch of Idaho said, "I'm not giving any interviews about this presidential race." Sen. Jerry Moran, of Kansas, ducked into an elevator apparently avoiding questions about Trump, and other Republicans were apprehensive, saying they needed more time.

"I haven't met him yet, so I want to get to talk to him about some issues," said Sen. Shelley Moore Capito of West Virginia.

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