In the midst of a softball interview conducted at the Republican National Convention with Rep. Tom Emmer (R-MN), CNN’s Kate Bolduan had to pull the GOP lawmaker up short as he went on a rant about President Joe Biden. Speaking before the GOP’s proceedings restarted, Emmer boosted the candidacy of Donald Trump and his heir apparent, Sen. J.D. Vance (R-OH) before turning the conversation to Biden who is expected to be the Democratic nominee. When the talk turned to U.S. support for Ukraine in its war with Russia, the CNN host felt compelled to interrupt after she mentioned Vance’s opposition to …