Billionaire industrialist and senior White House advisor Elon Musk vowed Sunday to maintain Ukraine's access to his Starlink satellite network, after a fierce online clash with Poland's outspoken foreign minister.On Sunday, during exchanges on his own X social media platform, Musk promised that this would not be the case, after an online clash with the Polish foreign minister, Radoslaw Sikorski, that drew in US Secretary of State Marco Rubio.