(Reuters) – President Joe Biden signaled on Friday that he is hopeful a deal over the U.S.-Mexico border could be worked out next week at least in the Senate, controlled by his Democratic Party, adding that “significant policy changes” were needed. Republicans in Congress have blocked emergency funding for Ukraine in an effort to push new security policies along the U.S.-Mexico border. They blame Biden’s policies for an influx of immigrants into the United States. “I think next week we’re going to be able to work out something, at least in the Senate, and I’m hopeful that it’s going to be a bi…