A Republican businessman has announced that he will seek his party’s endorsement to challenge Democratic Senator Al Franken in next year’s election. Mike McFadden launched his campaign Wednesday with a three-minute Web video that describes his Minnesota roots and concern “about the direction this country is headed.” He’s a first-time candidate and the first Republican to step up against Franken. He also filed formal paperwork to form a campaign fundraising committee. McFadden is 48 and runs a financial management firm. Franken intends to seek another 6-year term after winning the last one by a tiny margin following a recount and court fight. He has amassed a healthy campaign treasury so far.