In US, House of Representatives has taken the first step toward demolishing President Barack Obama's signature healthcare law. The Republicans passed a budget measure that eases passage of a new law and would overcome any Democratic block. But lawmakers in both parties remained concerned about a lack of replacement for the law, known as Obamacare. <br/><br/>The political showdown raises a big question mark over medical coverage for more than 20 million Americans.<br/><br/>The measure passed in the House nearly on a party-line vote, 227-198, delivering a blow to President Obama's legacy a week before he leaves office. It instructs four committees on Capitol Hill to draft repeal legislation by January, 27th. The Senate passed the resolution by 51-48 on Thursday.