NEW: Senator John Fetterman (D-PA) dismisses Democratic "freakouts" over Trump's proposal to acquire Greenland.
"It's a responsible conversation [...] Remember the Louisiana Purchase? I think Alaska was a pretty great deal, too."
"I mean - [I'm] open to having all kinds of conversations. It's not helpful to freak out. Some things might work out, some may not."
"He hasn't even taken office [until] 2 weeks... we really need to pace ourselves, if we're going to freak out over every tweet."
